19718860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2309}}^1$

素因数の和:2386

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 28403060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2309, 4270, 4618, 8540, 9236, 11545, 16163, 23090, 32326, 46180, 64652, 80815, 140849, 161630, 281698, 323260, 563396, 704245, 985943, 1408490, 1971886, 2816980, 3943772, 4929715, 9859430, 19718860]

約数ペア:

[(1, 19718860), (2, 9859430), (4, 4929715), (5, 3943772), (7, 2816980), (10, 1971886), (14, 1408490), (20, 985943), (28, 704245), (35, 563396), (61, 323260), (70, 281698), (122, 161630), (140, 140849), (244, 80815), (305, 64652), (427, 46180), (610, 32326), (854, 23090), (1220, 16163), (1708, 11545), (2135, 9236), (2309, 8540), (4270, 4618)]