405680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{461}}^1$

素因数の和:485

約数の個数: 40

約数和(自身を含む): 1031184

約数和(自身を除く): 625504

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 461, 880, 922, 1844, 2305, 3688, 4610, 5071, 7376, 9220, 10142, 18440, 20284, 25355, 36880, 40568, 50710, 81136, 101420, 202840, 405680]

約数ペア:

[(1, 405680), (2, 202840), (4, 101420), (5, 81136), (8, 50710), (10, 40568), (11, 36880), (16, 25355), (20, 20284), (22, 18440), (40, 10142), (44, 9220), (55, 7376), (80, 5071), (88, 4610), (110, 3688), (176, 2305), (220, 1844), (440, 922), (461, 880)]