21431848

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 43685460

約数和(自身を除く): 22253612

約数列:

[1, 2, 4, 8, 19, 38, 41, 76, 82, 152, 164, 181, 328, 361, 362, 722, 724, 779, 1444, 1448, 1558, 2888, 3116, 3439, 6232, 6878, 7421, 13756, 14801, 14842, 27512, 29602, 29684, 59204, 59368, 65341, 118408, 130682, 140999, 261364, 281998, 522728, 563996, 1127992, 2678981, 5357962, 10715924, 21431848]

約数ペア:

[(1, 21431848), (2, 10715924), (4, 5357962), (8, 2678981), (19, 1127992), (38, 563996), (41, 522728), (76, 281998), (82, 261364), (152, 140999), (164, 130682), (181, 118408), (328, 65341), (361, 59368), (362, 59204), (722, 29684), (724, 29602), (779, 27512), (1444, 14842), (1448, 14801), (1558, 13756), (2888, 7421), (3116, 6878), (3439, 6232)]