20878720

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1$

素因数の和:156

約数の個数: 128

約数和(自身を含む): 56181600

約数和(自身を除く): 35302880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 64, 68, 76, 80, 85, 95, 101, 128, 136, 152, 160, 170, 190, 202, 272, 304, 320, 323, 340, 380, 404, 505, 544, 608, 640, 646, 680, 760, 808, 1010, 1088, 1216, 1292, 1360, 1520, 1615, 1616, 1717, 1919, 2020, 2176, 2432, 2584, 2720, 3040, 3230, 3232, 3434, 3838, 4040, 5168, 5440, 6080, 6460, 6464, 6868, 7676, 8080, 8585, 9595, 10336, 10880, 12160, 12920, 12928, 13736, 15352, 16160, 17170, 19190, 20672, 25840, 27472, 30704, 32320, 32623, 34340, 38380, 41344, 51680, 54944, 61408, 64640, 65246, 68680, 76760, 103360, 109888, 122816, 130492, 137360, 153520, 163115, 206720, 219776, 245632, 260984, 274720, 307040, 326230, 521968, 549440, 614080, 652460, 1043936, 1098880, 1228160, 1304920, 2087872, 2609840, 4175744, 5219680, 10439360, 20878720]

約数ペア:

[(1, 20878720), (2, 10439360), (4, 5219680), (5, 4175744), (8, 2609840), (10, 2087872), (16, 1304920), (17, 1228160), (19, 1098880), (20, 1043936), (32, 652460), (34, 614080), (38, 549440), (40, 521968), (64, 326230), (68, 307040), (76, 274720), (80, 260984), (85, 245632), (95, 219776), (101, 206720), (128, 163115), (136, 153520), (152, 137360), (160, 130492), (170, 122816), (190, 109888), (202, 103360), (272, 76760), (304, 68680), (320, 65246), (323, 64640), (340, 61408), (380, 54944), (404, 51680), (505, 41344), (544, 38380), (608, 34340), (640, 32623), (646, 32320), (680, 30704), (760, 27472), (808, 25840), (1010, 20672), (1088, 19190), (1216, 17170), (1292, 16160), (1360, 15352), (1520, 13736), (1615, 12928), (1616, 12920), (1717, 12160), (1919, 10880), (2020, 10336), (2176, 9595), (2432, 8585), (2584, 8080), (2720, 7676), (3040, 6868), (3230, 6464), (3232, 6460), (3434, 6080), (3838, 5440), (4040, 5168)]