165406840

素因数分解:

$2^3\times 5^1\times {\mathrm{1621}}^1\times {\mathrm{2551}}^1$

素因数の和:4183

約数の個数: 32

約数和(自身を含む): 372540960

約数和(自身を除く): 207134120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1621, 2551, 3242, 5102, 6484, 8105, 10204, 12755, 12968, 16210, 20408, 25510, 32420, 51020, 64840, 102040, 4135171, 8270342, 16540684, 20675855, 33081368, 41351710, 82703420, 165406840]

約数ペア:

[(1, 165406840), (2, 82703420), (4, 41351710), (5, 33081368), (8, 20675855), (10, 16540684), (20, 8270342), (40, 4135171), (1621, 102040), (2551, 64840), (3242, 51020), (5102, 32420), (6484, 25510), (8105, 20408), (10204, 16210), (12755, 12968)]