31384840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:382

約数の個数: 64

約数和(自身を含む): 73560960

約数和(自身を除く): 42176120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 71, 86, 142, 172, 215, 257, 284, 344, 355, 430, 514, 568, 710, 860, 1028, 1285, 1420, 1720, 2056, 2570, 2840, 3053, 5140, 6106, 10280, 11051, 12212, 15265, 18247, 22102, 24424, 30530, 36494, 44204, 55255, 61060, 72988, 88408, 91235, 110510, 122120, 145976, 182470, 221020, 364940, 442040, 729880, 784621, 1569242, 3138484, 3923105, 6276968, 7846210, 15692420, 31384840]

約数ペア:

[(1, 31384840), (2, 15692420), (4, 7846210), (5, 6276968), (8, 3923105), (10, 3138484), (20, 1569242), (40, 784621), (43, 729880), (71, 442040), (86, 364940), (142, 221020), (172, 182470), (215, 145976), (257, 122120), (284, 110510), (344, 91235), (355, 88408), (430, 72988), (514, 61060), (568, 55255), (710, 44204), (860, 36494), (1028, 30530), (1285, 24424), (1420, 22102), (1720, 18247), (2056, 15265), (2570, 12212), (2840, 11051), (3053, 10280), (5140, 6106)]