21499982

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{617}}^1$

素因数の和:776

約数の個数: 32

約数和(自身を含む): 39156480

約数和(自身を除く): 17656498

約数列:

[1, 2, 7, 14, 19, 38, 131, 133, 262, 266, 617, 917, 1234, 1834, 2489, 4319, 4978, 8638, 11723, 17423, 23446, 34846, 80827, 82061, 161654, 164122, 565789, 1131578, 1535713, 3071426, 10749991, 21499982]

約数ペア:

[(1, 21499982), (2, 10749991), (7, 3071426), (14, 1535713), (19, 1131578), (38, 565789), (131, 164122), (133, 161654), (262, 82061), (266, 80827), (617, 34846), (917, 23446), (1234, 17423), (1834, 11723), (2489, 8638), (4319, 4978)]