81228800

素因数分解:

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

素因数の和:216

約数の個数: 132

約数和(自身を含む): 213215520

約数和(自身を除く): 131986720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 64, 76, 80, 95, 100, 128, 152, 160, 167, 190, 200, 256, 304, 320, 334, 380, 400, 475, 512, 608, 640, 668, 760, 800, 835, 950, 1024, 1216, 1280, 1336, 1520, 1600, 1670, 1900, 2432, 2560, 2672, 3040, 3173, 3200, 3340, 3800, 4175, 4864, 5120, 5344, 6080, 6346, 6400, 6680, 7600, 8350, 9728, 10688, 12160, 12692, 12800, 13360, 15200, 15865, 16700, 19456, 21376, 24320, 25384, 25600, 26720, 30400, 31730, 33400, 42752, 48640, 50768, 53440, 60800, 63460, 66800, 79325, 85504, 97280, 101536, 106880, 121600, 126920, 133600, 158650, 171008, 203072, 213760, 243200, 253840, 267200, 317300, 406144, 427520, 486400, 507680, 534400, 634600, 812288, 855040, 1015360, 1068800, 1269200, 1624576, 2030720, 2137600, 2538400, 3249152, 4061440, 4275200, 5076800, 8122880, 10153600, 16245760, 20307200, 40614400, 81228800]

約数ペア:

[(1, 81228800), (2, 40614400), (4, 20307200), (5, 16245760), (8, 10153600), (10, 8122880), (16, 5076800), (19, 4275200), (20, 4061440), (25, 3249152), (32, 2538400), (38, 2137600), (40, 2030720), (50, 1624576), (64, 1269200), (76, 1068800), (80, 1015360), (95, 855040), (100, 812288), (128, 634600), (152, 534400), (160, 507680), (167, 486400), (190, 427520), (200, 406144), (256, 317300), (304, 267200), (320, 253840), (334, 243200), (380, 213760), (400, 203072), (475, 171008), (512, 158650), (608, 133600), (640, 126920), (668, 121600), (760, 106880), (800, 101536), (835, 97280), (950, 85504), (1024, 79325), (1216, 66800), (1280, 63460), (1336, 60800), (1520, 53440), (1600, 50768), (1670, 48640), (1900, 42752), (2432, 33400), (2560, 31730), (2672, 30400), (3040, 26720), (3173, 25600), (3200, 25384), (3340, 24320), (3800, 21376), (4175, 19456), (4864, 16700), (5120, 15865), (5344, 15200), (6080, 13360), (6346, 12800), (6400, 12692), (6680, 12160), (7600, 10688), (8350, 9728)]