21507685

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{467}}^1$

素因数の和:684

約数の個数: 16

約数和(自身を含む): 26462592

約数和(自身を除く): 4954907

約数列:

[1, 5, 61, 151, 305, 467, 755, 2335, 9211, 28487, 46055, 70517, 142435, 352585, 4301537, 21507685]

約数ペア:

[(1, 21507685), (5, 4301537), (61, 352585), (151, 142435), (305, 70517), (467, 46055), (755, 28487), (2335, 9211)]