1640821760

素因数分解:

$2^{10}\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:312

約数の個数: 176

約数和(自身を含む): 4209287040

約数和(自身を除く): 2568465280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 101, 128, 152, 160, 167, 190, 202, 256, 304, 320, 334, 380, 404, 505, 512, 608, 640, 668, 760, 808, 835, 1010, 1024, 1216, 1280, 1336, 1520, 1616, 1670, 1919, 2020, 2432, 2560, 2672, 3040, 3173, 3232, 3340, 3838, 4040, 4864, 5120, 5344, 6080, 6346, 6464, 6680, 7676, 8080, 9595, 9728, 10688, 12160, 12692, 12928, 13360, 15352, 15865, 16160, 16867, 19190, 19456, 21376, 24320, 25384, 25856, 26720, 30704, 31730, 32320, 33734, 38380, 42752, 48640, 50768, 51712, 53440, 61408, 63460, 64640, 67468, 76760, 84335, 85504, 97280, 101536, 103424, 106880, 122816, 126920, 129280, 134936, 153520, 168670, 171008, 203072, 213760, 245632, 253840, 258560, 269872, 307040, 320473, 337340, 406144, 427520, 491264, 507680, 517120, 539744, 614080, 640946, 674680, 812288, 855040, 982528, 1015360, 1079488, 1228160, 1281892, 1349360, 1602365, 1624576, 1965056, 2030720, 2158976, 2456320, 2563784, 2698720, 3204730, 3249152, 4061440, 4317952, 4912640, 5127568, 5397440, 6409460, 8122880, 8635904, 9825280, 10255136, 10794880, 12818920, 16245760, 17271808, 20510272, 21589760, 25637840, 41020544, 43179520, 51275680, 82041088, 86359040, 102551360, 164082176, 205102720, 328164352, 410205440, 820410880, 1640821760]

約数ペア:

[(1, 1640821760), (2, 820410880), (4, 410205440), (5, 328164352), (8, 205102720), (10, 164082176), (16, 102551360), (19, 86359040), (20, 82041088), (32, 51275680), (38, 43179520), (40, 41020544), (64, 25637840), (76, 21589760), (80, 20510272), (95, 17271808), (101, 16245760), (128, 12818920), (152, 10794880), (160, 10255136), (167, 9825280), (190, 8635904), (202, 8122880), (256, 6409460), (304, 5397440), (320, 5127568), (334, 4912640), (380, 4317952), (404, 4061440), (505, 3249152), (512, 3204730), (608, 2698720), (640, 2563784), (668, 2456320), (760, 2158976), (808, 2030720), (835, 1965056), (1010, 1624576), (1024, 1602365), (1216, 1349360), (1280, 1281892), (1336, 1228160), (1520, 1079488), (1616, 1015360), (1670, 982528), (1919, 855040), (2020, 812288), (2432, 674680), (2560, 640946), (2672, 614080), (3040, 539744), (3173, 517120), (3232, 507680), (3340, 491264), (3838, 427520), (4040, 406144), (4864, 337340), (5120, 320473), (5344, 307040), (6080, 269872), (6346, 258560), (6464, 253840), (6680, 245632), (7676, 213760), (8080, 203072), (9595, 171008), (9728, 168670), (10688, 153520), (12160, 134936), (12692, 129280), (12928, 126920), (13360, 122816), (15352, 106880), (15865, 103424), (16160, 101536), (16867, 97280), (19190, 85504), (19456, 84335), (21376, 76760), (24320, 67468), (25384, 64640), (25856, 63460), (26720, 61408), (30704, 53440), (31730, 51712), (32320, 50768), (33734, 48640), (38380, 42752)]