21299740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13831}}^1$

素因数の和:13858

約数の個数: 48

約数和(自身を含む): 55770624

約数和(自身を除く): 34470884

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13831, 27662, 55324, 69155, 96817, 138310, 152141, 193634, 276620, 304282, 387268, 484085, 608564, 760705, 968170, 1064987, 1521410, 1936340, 2129974, 3042820, 4259948, 5324935, 10649870, 21299740]

約数ペア:

[(1, 21299740), (2, 10649870), (4, 5324935), (5, 4259948), (7, 3042820), (10, 2129974), (11, 1936340), (14, 1521410), (20, 1064987), (22, 968170), (28, 760705), (35, 608564), (44, 484085), (55, 387268), (70, 304282), (77, 276620), (110, 193634), (140, 152141), (154, 138310), (220, 96817), (308, 69155), (385, 55324), (770, 27662), (1540, 13831)]