21111860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13709}}^1$

素因数の和:13736

約数の個数: 48

約数和(自身を含む): 55278720

約数和(自身を除く): 34166860

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13709, 27418, 54836, 68545, 95963, 137090, 150799, 191926, 274180, 301598, 383852, 479815, 603196, 753995, 959630, 1055593, 1507990, 1919260, 2111186, 3015980, 4222372, 5277965, 10555930, 21111860]

約数ペア:

[(1, 21111860), (2, 10555930), (4, 5277965), (5, 4222372), (7, 3015980), (10, 2111186), (11, 1919260), (14, 1507990), (20, 1055593), (22, 959630), (28, 753995), (35, 603196), (44, 479815), (55, 383852), (70, 301598), (77, 274180), (110, 191926), (140, 150799), (154, 137090), (220, 95963), (308, 68545), (385, 54836), (770, 27418), (1540, 13709)]