18710020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1249}}^1$

素因数の和:1372

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 26649980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 107, 140, 214, 428, 535, 749, 1070, 1249, 1498, 2140, 2498, 2996, 3745, 4996, 6245, 7490, 8743, 12490, 14980, 17486, 24980, 34972, 43715, 87430, 133643, 174860, 267286, 534572, 668215, 935501, 1336430, 1871002, 2672860, 3742004, 4677505, 9355010, 18710020]

約数ペア:

[(1, 18710020), (2, 9355010), (4, 4677505), (5, 3742004), (7, 2672860), (10, 1871002), (14, 1336430), (20, 935501), (28, 668215), (35, 534572), (70, 267286), (107, 174860), (140, 133643), (214, 87430), (428, 43715), (535, 34972), (749, 24980), (1070, 17486), (1249, 14980), (1498, 12490), (2140, 8743), (2498, 7490), (2996, 6245), (3745, 4996)]