20979470

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{991}}^1$

素因数の和:1100

約数の個数: 32

約数和(自身を含む): 39640320

約数和(自身を除く): 18660850

約数列:

[1, 2, 5, 10, 29, 58, 73, 145, 146, 290, 365, 730, 991, 1982, 2117, 4234, 4955, 9910, 10585, 21170, 28739, 57478, 72343, 143695, 144686, 287390, 361715, 723430, 2097947, 4195894, 10489735, 20979470]

約数ペア:

[(1, 20979470), (2, 10489735), (5, 4195894), (10, 2097947), (29, 723430), (58, 361715), (73, 287390), (145, 144686), (146, 143695), (290, 72343), (365, 57478), (730, 28739), (991, 21170), (1982, 10585), (2117, 9910), (4234, 4955)]