8813980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{401}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 21341376

約数和(自身を除く): 12527396

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 401, 628, 785, 802, 1099, 1570, 1604, 2005, 2198, 2807, 3140, 4010, 4396, 5495, 5614, 8020, 10990, 11228, 14035, 21980, 28070, 56140, 62957, 125914, 251828, 314785, 440699, 629570, 881398, 1259140, 1762796, 2203495, 4406990, 8813980]

約数ペア:

[(1, 8813980), (2, 4406990), (4, 2203495), (5, 1762796), (7, 1259140), (10, 881398), (14, 629570), (20, 440699), (28, 314785), (35, 251828), (70, 125914), (140, 62957), (157, 56140), (314, 28070), (401, 21980), (628, 14035), (785, 11228), (802, 10990), (1099, 8020), (1570, 5614), (1604, 5495), (2005, 4396), (2198, 4010), (2807, 3140)]