19791640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1451}}^1$

素因数の和:1504

約数の個数: 64

約数和(自身を含む): 50181120

約数和(自身を除く): 30389480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1451, 1705, 2728, 2902, 3410, 5804, 6820, 7255, 11608, 13640, 14510, 15961, 29020, 31922, 44981, 58040, 63844, 79805, 89962, 127688, 159610, 179924, 224905, 319220, 359848, 449810, 494791, 638440, 899620, 989582, 1799240, 1979164, 2473955, 3958328, 4947910, 9895820, 19791640]

約数ペア:

[(1, 19791640), (2, 9895820), (4, 4947910), (5, 3958328), (8, 2473955), (10, 1979164), (11, 1799240), (20, 989582), (22, 899620), (31, 638440), (40, 494791), (44, 449810), (55, 359848), (62, 319220), (88, 224905), (110, 179924), (124, 159610), (155, 127688), (220, 89962), (248, 79805), (310, 63844), (341, 58040), (440, 44981), (620, 31922), (682, 29020), (1240, 15961), (1364, 14510), (1451, 13640), (1705, 11608), (2728, 7255), (2902, 6820), (3410, 5804)]