21265660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{919}}^1$

素因数の和:1030

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 27420740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 890, 919, 1157, 1780, 1838, 2314, 3676, 4595, 4628, 5785, 9190, 11570, 11947, 18380, 23140, 23894, 47788, 59735, 81791, 119470, 163582, 238940, 327164, 408955, 817910, 1063283, 1635820, 2126566, 4253132, 5316415, 10632830, 21265660]

約数ペア:

[(1, 21265660), (2, 10632830), (4, 5316415), (5, 4253132), (10, 2126566), (13, 1635820), (20, 1063283), (26, 817910), (52, 408955), (65, 327164), (89, 238940), (130, 163582), (178, 119470), (260, 81791), (356, 59735), (445, 47788), (890, 23894), (919, 23140), (1157, 18380), (1780, 11947), (1838, 11570), (2314, 9190), (3676, 5785), (4595, 4628)]