21168165

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61357}}^1$

素因数の和:61388

約数の個数: 16

約数和(自身を含む): 35342208

約数和(自身を除く): 14174043

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61357, 184071, 306785, 920355, 1411211, 4233633, 7056055, 21168165]

約数ペア:

[(1, 21168165), (3, 7056055), (5, 4233633), (15, 1411211), (23, 920355), (69, 306785), (115, 184071), (345, 61357)]