21343985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{8009}}^1$

素因数の和:8068

約数の個数: 16

約数和(自身を含む): 28259280

約数和(自身を除く): 6915295

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 8009, 40045, 104117, 328369, 520585, 1641845, 4268797, 21343985]

約数ペア:

[(1, 21343985), (5, 4268797), (13, 1641845), (41, 520585), (65, 328369), (205, 104117), (533, 40045), (2665, 8009)]