678951640

素因数分解:

$2^3\times 5^1\times {\mathrm{2549}}^1\times {\mathrm{6659}}^1$

素因数の和:9219

約数の個数: 32

約数和(自身を含む): 1528470000

約数和(自身を除く): 849518360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2549, 5098, 6659, 10196, 12745, 13318, 20392, 25490, 26636, 33295, 50980, 53272, 66590, 101960, 133180, 266360, 16973791, 33947582, 67895164, 84868955, 135790328, 169737910, 339475820, 678951640]

約数ペア:

[(1, 678951640), (2, 339475820), (4, 169737910), (5, 135790328), (8, 84868955), (10, 67895164), (20, 33947582), (40, 16973791), (2549, 266360), (5098, 133180), (6659, 101960), (10196, 66590), (12745, 53272), (13318, 50980), (20392, 33295), (25490, 26636)]