21237704

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{457}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 41247480

約数和(自身を除く): 20009776

約数列:

[1, 2, 4, 8, 37, 74, 148, 157, 296, 314, 457, 628, 914, 1256, 1828, 3656, 5809, 11618, 16909, 23236, 33818, 46472, 67636, 71749, 135272, 143498, 286996, 573992, 2654713, 5309426, 10618852, 21237704]

約数ペア:

[(1, 21237704), (2, 10618852), (4, 5309426), (8, 2654713), (37, 573992), (74, 286996), (148, 143498), (157, 135272), (296, 71749), (314, 67636), (457, 46472), (628, 33818), (914, 23236), (1256, 16909), (1828, 11618), (3656, 5809)]