21278451

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1\times {\mathrm{659}}^1$

素因数の和:938

約数の個数: 16

約数和(自身を含む): 29145600

約数和(自身を除く): 7867149

約数列:

[1, 3, 47, 141, 229, 659, 687, 1977, 10763, 30973, 32289, 92919, 150911, 452733, 7092817, 21278451]

約数ペア:

[(1, 21278451), (3, 7092817), (47, 452733), (141, 150911), (229, 92919), (659, 32289), (687, 30973), (1977, 10763)]