21375575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:851

約数の個数: 24

約数和(自身を含む): 28904400

約数和(自身を除く): 7528825

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 739, 1157, 2225, 3695, 5785, 9607, 18475, 28925, 48035, 65771, 240175, 328855, 855023, 1644275, 4275115, 21375575]

約数ペア:

[(1, 21375575), (5, 4275115), (13, 1644275), (25, 855023), (65, 328855), (89, 240175), (325, 65771), (445, 48035), (739, 28925), (1157, 18475), (2225, 9607), (3695, 5785)]