20830760

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 49144320

約数和(自身を除く): 28313560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 107, 124, 155, 157, 214, 248, 310, 314, 428, 535, 620, 628, 785, 856, 1070, 1240, 1256, 1570, 2140, 3140, 3317, 4280, 4867, 6280, 6634, 9734, 13268, 16585, 16799, 19468, 24335, 26536, 33170, 33598, 38936, 48670, 66340, 67196, 83995, 97340, 132680, 134392, 167990, 194680, 335980, 520769, 671960, 1041538, 2083076, 2603845, 4166152, 5207690, 10415380, 20830760]

約数ペア:

[(1, 20830760), (2, 10415380), (4, 5207690), (5, 4166152), (8, 2603845), (10, 2083076), (20, 1041538), (31, 671960), (40, 520769), (62, 335980), (107, 194680), (124, 167990), (155, 134392), (157, 132680), (214, 97340), (248, 83995), (310, 67196), (314, 66340), (428, 48670), (535, 38936), (620, 33598), (628, 33170), (785, 26536), (856, 24335), (1070, 19468), (1240, 16799), (1256, 16585), (1570, 13268), (2140, 9734), (3140, 6634), (3317, 6280), (4280, 4867)]