81240640

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{331}}^1$

素因数の和:420

約数の個数: 112

約数和(自身を含む): 212506560

約数和(自身を除く): 131265920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 59, 64, 65, 80, 104, 118, 130, 160, 208, 236, 260, 295, 320, 331, 416, 472, 520, 590, 662, 767, 832, 944, 1040, 1180, 1324, 1534, 1655, 1888, 2080, 2360, 2648, 3068, 3310, 3776, 3835, 4160, 4303, 4720, 5296, 6136, 6620, 7670, 8606, 9440, 10592, 12272, 13240, 15340, 17212, 18880, 19529, 21184, 21515, 24544, 26480, 30680, 34424, 39058, 43030, 49088, 52960, 61360, 68848, 78116, 86060, 97645, 105920, 122720, 137696, 156232, 172120, 195290, 245440, 253877, 275392, 312464, 344240, 390580, 507754, 624928, 688480, 781160, 1015508, 1249856, 1269385, 1376960, 1562320, 2031016, 2538770, 3124640, 4062032, 5077540, 6249280, 8124064, 10155080, 16248128, 20310160, 40620320, 81240640]

約数ペア:

[(1, 81240640), (2, 40620320), (4, 20310160), (5, 16248128), (8, 10155080), (10, 8124064), (13, 6249280), (16, 5077540), (20, 4062032), (26, 3124640), (32, 2538770), (40, 2031016), (52, 1562320), (59, 1376960), (64, 1269385), (65, 1249856), (80, 1015508), (104, 781160), (118, 688480), (130, 624928), (160, 507754), (208, 390580), (236, 344240), (260, 312464), (295, 275392), (320, 253877), (331, 245440), (416, 195290), (472, 172120), (520, 156232), (590, 137696), (662, 122720), (767, 105920), (832, 97645), (944, 86060), (1040, 78116), (1180, 68848), (1324, 61360), (1534, 52960), (1655, 49088), (1888, 43030), (2080, 39058), (2360, 34424), (2648, 30680), (3068, 26480), (3310, 24544), (3776, 21515), (3835, 21184), (4160, 19529), (4303, 18880), (4720, 17212), (5296, 15340), (6136, 13240), (6620, 12272), (7670, 10592), (8606, 9440)]