87988880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2213}}^1$

素因数の和:2304

約数の個数: 80

約数和(自身を含む): 237199104

約数和(自身を除く): 149210224

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 560, 568, 710, 994, 1136, 1420, 1988, 2213, 2485, 2840, 3976, 4426, 4970, 5680, 7952, 8852, 9940, 11065, 15491, 17704, 19880, 22130, 30982, 35408, 39760, 44260, 61964, 77455, 88520, 123928, 154910, 157123, 177040, 247856, 309820, 314246, 619640, 628492, 785615, 1099861, 1239280, 1256984, 1571230, 2199722, 2513968, 3142460, 4399444, 5499305, 6284920, 8798888, 10998610, 12569840, 17597776, 21997220, 43994440, 87988880]

約数ペア:

[(1, 87988880), (2, 43994440), (4, 21997220), (5, 17597776), (7, 12569840), (8, 10998610), (10, 8798888), (14, 6284920), (16, 5499305), (20, 4399444), (28, 3142460), (35, 2513968), (40, 2199722), (56, 1571230), (70, 1256984), (71, 1239280), (80, 1099861), (112, 785615), (140, 628492), (142, 619640), (280, 314246), (284, 309820), (355, 247856), (497, 177040), (560, 157123), (568, 154910), (710, 123928), (994, 88520), (1136, 77455), (1420, 61964), (1988, 44260), (2213, 39760), (2485, 35408), (2840, 30982), (3976, 22130), (4426, 19880), (4970, 17704), (5680, 15491), (7952, 11065), (8852, 9940)]