64637800

素因数分解:

$2^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{4091}}^1$

素因数の和:4186

約数の個数: 48

約数和(自身を含む): 152222400

約数和(自身を除く): 87584600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 158, 200, 316, 395, 632, 790, 1580, 1975, 3160, 3950, 4091, 7900, 8182, 15800, 16364, 20455, 32728, 40910, 81820, 102275, 163640, 204550, 323189, 409100, 646378, 818200, 1292756, 1615945, 2585512, 3231890, 6463780, 8079725, 12927560, 16159450, 32318900, 64637800]

約数ペア:

[(1, 64637800), (2, 32318900), (4, 16159450), (5, 12927560), (8, 8079725), (10, 6463780), (20, 3231890), (25, 2585512), (40, 1615945), (50, 1292756), (79, 818200), (100, 646378), (158, 409100), (200, 323189), (316, 204550), (395, 163640), (632, 102275), (790, 81820), (1580, 40910), (1975, 32728), (3160, 20455), (3950, 16364), (4091, 15800), (7900, 8182)]