51212920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{487}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 126489600

約数和(自身を除く): 75276680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 239, 440, 478, 487, 956, 974, 1195, 1912, 1948, 2390, 2435, 2629, 3896, 4780, 4870, 5258, 5357, 9560, 9740, 10516, 10714, 13145, 19480, 21032, 21428, 26290, 26785, 42856, 52580, 53570, 105160, 107140, 116393, 214280, 232786, 465572, 581965, 931144, 1163930, 1280323, 2327860, 2560646, 4655720, 5121292, 6401615, 10242584, 12803230, 25606460, 51212920]

約数ペア:

[(1, 51212920), (2, 25606460), (4, 12803230), (5, 10242584), (8, 6401615), (10, 5121292), (11, 4655720), (20, 2560646), (22, 2327860), (40, 1280323), (44, 1163930), (55, 931144), (88, 581965), (110, 465572), (220, 232786), (239, 214280), (440, 116393), (478, 107140), (487, 105160), (956, 53570), (974, 52580), (1195, 42856), (1912, 26785), (1948, 26290), (2390, 21428), (2435, 21032), (2629, 19480), (3896, 13145), (4780, 10714), (4870, 10516), (5258, 9740), (5357, 9560)]