21812615

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{569}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 31026240

約数和(自身を除く): 9213625

約数列:

[1, 5, 11, 17, 41, 55, 85, 187, 205, 451, 569, 697, 935, 2255, 2845, 3485, 6259, 7667, 9673, 23329, 31295, 38335, 48365, 106403, 116645, 256619, 396593, 532015, 1283095, 1982965, 4362523, 21812615]

約数ペア:

[(1, 21812615), (5, 4362523), (11, 1982965), (17, 1283095), (41, 532015), (55, 396593), (85, 256619), (187, 116645), (205, 106403), (451, 48365), (569, 38335), (697, 31295), (935, 23329), (2255, 9673), (2845, 7667), (3485, 6259)]