21139315

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1\times {\mathrm{331}}^1$

素因数の和:630

約数の個数: 16

約数和(自身を含む): 26031456

約数和(自身を除く): 4892141

約数列:

[1, 5, 53, 241, 265, 331, 1205, 1655, 12773, 17543, 63865, 79771, 87715, 398855, 4227863, 21139315]

約数ペア:

[(1, 21139315), (5, 4227863), (53, 398855), (241, 87715), (265, 79771), (331, 63865), (1205, 17543), (1655, 12773)]