21341887

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:550

約数の個数: 16

約数和(自身を含む): 25030144

約数和(自身を除く): 3688257

約数列:

[1, 7, 61, 151, 331, 427, 1057, 2317, 9211, 20191, 49981, 64477, 141337, 349867, 3048841, 21341887]

約数ペア:

[(1, 21341887), (7, 3048841), (61, 349867), (151, 141337), (331, 64477), (427, 49981), (1057, 20191), (2317, 9211)]