21258993

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 14593551

約数列:

[1, 3, 7, 17, 21, 47, 49, 51, 119, 141, 147, 181, 329, 357, 543, 799, 833, 987, 1267, 2303, 2397, 2499, 3077, 3801, 5593, 6909, 8507, 8869, 9231, 16779, 21539, 25521, 26607, 39151, 59549, 64617, 117453, 144619, 150773, 178647, 416843, 433857, 452319, 1012333, 1250529, 3036999, 7086331, 21258993]

約数ペア:

[(1, 21258993), (3, 7086331), (7, 3036999), (17, 1250529), (21, 1012333), (47, 452319), (49, 433857), (51, 416843), (119, 178647), (141, 150773), (147, 144619), (181, 117453), (329, 64617), (357, 59549), (543, 39151), (799, 26607), (833, 25521), (987, 21539), (1267, 16779), (2303, 9231), (2397, 8869), (2499, 8507), (3077, 6909), (3801, 5593)]