21400965

素因数分解:

$3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{2749}}^1$

素因数の和:2933

約数の個数: 24

約数和(自身を含む): 37323000

約数和(自身を除く): 15922035

約数列:

[1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 2749, 7785, 8247, 13745, 24741, 41235, 123705, 475577, 1426731, 2377885, 4280193, 7133655, 21400965]

約数ペア:

[(1, 21400965), (3, 7133655), (5, 4280193), (9, 2377885), (15, 1426731), (45, 475577), (173, 123705), (519, 41235), (865, 24741), (1557, 13745), (2595, 8247), (2749, 7785)]