20890760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{601}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 52012800

約数和(自身を除く): 31122040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 601, 632, 790, 869, 1202, 1580, 1738, 2404, 3005, 3160, 3476, 4345, 4808, 6010, 6611, 6952, 8690, 12020, 13222, 17380, 24040, 26444, 33055, 34760, 47479, 52888, 66110, 94958, 132220, 189916, 237395, 264440, 379832, 474790, 522269, 949580, 1044538, 1899160, 2089076, 2611345, 4178152, 5222690, 10445380, 20890760]

約数ペア:

[(1, 20890760), (2, 10445380), (4, 5222690), (5, 4178152), (8, 2611345), (10, 2089076), (11, 1899160), (20, 1044538), (22, 949580), (40, 522269), (44, 474790), (55, 379832), (79, 264440), (88, 237395), (110, 189916), (158, 132220), (220, 94958), (316, 66110), (395, 52888), (440, 47479), (601, 34760), (632, 33055), (790, 26444), (869, 24040), (1202, 17380), (1580, 13222), (1738, 12020), (2404, 8690), (3005, 6952), (3160, 6611), (3476, 6010), (4345, 4808)]