21904185

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{647}}^1$

素因数の和:753

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 14736327

約数列:

[1, 3, 5, 15, 37, 61, 111, 183, 185, 305, 555, 647, 915, 1941, 2257, 3235, 6771, 9705, 11285, 23939, 33855, 39467, 71817, 118401, 119695, 197335, 359085, 592005, 1460279, 4380837, 7301395, 21904185]

約数ペア:

[(1, 21904185), (3, 7301395), (5, 4380837), (15, 1460279), (37, 592005), (61, 359085), (111, 197335), (183, 119695), (185, 118401), (305, 71817), (555, 39467), (647, 33855), (915, 23939), (1941, 11285), (2257, 9705), (3235, 6771)]