81247280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{181}}^2$

素因数の和:406

約数の個数: 60

約数和(自身を含む): 196076736

約数和(自身を除く): 114829456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 181, 248, 310, 362, 496, 620, 724, 905, 1240, 1448, 1810, 2480, 2896, 3620, 5611, 7240, 11222, 14480, 22444, 28055, 32761, 44888, 56110, 65522, 89776, 112220, 131044, 163805, 224440, 262088, 327610, 448880, 524176, 655220, 1015591, 1310440, 2031182, 2620880, 4062364, 5077955, 8124728, 10155910, 16249456, 20311820, 40623640, 81247280]

約数ペア:

[(1, 81247280), (2, 40623640), (4, 20311820), (5, 16249456), (8, 10155910), (10, 8124728), (16, 5077955), (20, 4062364), (31, 2620880), (40, 2031182), (62, 1310440), (80, 1015591), (124, 655220), (155, 524176), (181, 448880), (248, 327610), (310, 262088), (362, 224440), (496, 163805), (620, 131044), (724, 112220), (905, 89776), (1240, 65522), (1448, 56110), (1810, 44888), (2480, 32761), (2896, 28055), (3620, 22444), (5611, 14480), (7240, 11222)]