20913715

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1\times {\mathrm{383}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 25694208

約数和(自身を除く): 4780493

約数列:

[1, 5, 67, 163, 335, 383, 815, 1915, 10921, 25661, 54605, 62429, 128305, 312145, 4182743, 20913715]

約数ペア:

[(1, 20913715), (5, 4182743), (67, 312145), (163, 128305), (335, 62429), (383, 54605), (815, 25661), (1915, 10921)]