21006915

素因数分解:

$3^1\times 5^1\times {\mathrm{331}}^1\times {\mathrm{4231}}^1$

素因数の和:4570

約数の個数: 16

約数和(自身を含む): 33720576

約数和(自身を除く): 12713661

約数列:

[1, 3, 5, 15, 331, 993, 1655, 4231, 4965, 12693, 21155, 63465, 1400461, 4201383, 7002305, 21006915]

約数ペア:

[(1, 21006915), (3, 7002305), (5, 4201383), (15, 1400461), (331, 63465), (993, 21155), (1655, 12693), (4231, 4965)]