20491240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6653}}^1$

素因数の和:6682

約数の個数: 64

約数和(自身を含む): 57490560

約数和(自身を除く): 36999320

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6653, 13306, 26612, 33265, 46571, 53224, 66530, 73183, 93142, 133060, 146366, 186284, 232855, 266120, 292732, 365915, 372568, 465710, 512281, 585464, 731830, 931420, 1024562, 1463660, 1862840, 2049124, 2561405, 2927320, 4098248, 5122810, 10245620, 20491240]

約数ペア:

[(1, 20491240), (2, 10245620), (4, 5122810), (5, 4098248), (7, 2927320), (8, 2561405), (10, 2049124), (11, 1862840), (14, 1463660), (20, 1024562), (22, 931420), (28, 731830), (35, 585464), (40, 512281), (44, 465710), (55, 372568), (56, 365915), (70, 292732), (77, 266120), (88, 232855), (110, 186284), (140, 146366), (154, 133060), (220, 93142), (280, 73183), (308, 66530), (385, 53224), (440, 46571), (616, 33265), (770, 26612), (1540, 13306), (3080, 6653)]