21747640

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3463}}^1$

素因数の和:3631

約数の個数: 32

約数和(自身を含む): 49258080

約数和(自身を除く): 27510440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3463, 6280, 6926, 13852, 17315, 27704, 34630, 69260, 138520, 543691, 1087382, 2174764, 2718455, 4349528, 5436910, 10873820, 21747640]

約数ペア:

[(1, 21747640), (2, 10873820), (4, 5436910), (5, 4349528), (8, 2718455), (10, 2174764), (20, 1087382), (40, 543691), (157, 138520), (314, 69260), (628, 34630), (785, 27704), (1256, 17315), (1570, 13852), (3140, 6926), (3463, 6280)]