21211508

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{251}}^1\times {\mathrm{571}}^1$

素因数の和:863

約数の個数: 24

約数和(自身を含む): 38342304

約数和(自身を除く): 17130796

約数列:

[1, 2, 4, 37, 74, 148, 251, 502, 571, 1004, 1142, 2284, 9287, 18574, 21127, 37148, 42254, 84508, 143321, 286642, 573284, 5302877, 10605754, 21211508]

約数ペア:

[(1, 21211508), (2, 10605754), (4, 5302877), (37, 573284), (74, 286642), (148, 143321), (251, 84508), (502, 42254), (571, 37148), (1004, 21127), (1142, 18574), (2284, 9287)]