21781715

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1\times {\mathrm{419}}^1$

素因数の和:742

約数の個数: 16

約数和(自身を含む): 27004320

約数和(自身を除く): 5222605

約数列:

[1, 5, 37, 185, 281, 419, 1405, 2095, 10397, 15503, 51985, 77515, 117739, 588695, 4356343, 21781715]

約数ペア:

[(1, 21781715), (5, 4356343), (37, 588695), (185, 117739), (281, 77515), (419, 51985), (1405, 15503), (2095, 10397)]