21242809

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{1303}}^1$

素因数の和:1464

約数の個数: 16

約数和(自身を含む): 25913088

約数和(自身を除く): 4670279

約数列:

[1, 7, 17, 119, 137, 959, 1303, 2329, 9121, 16303, 22151, 155057, 178511, 1249577, 3034687, 21242809]

約数ペア:

[(1, 21242809), (7, 3034687), (17, 1249577), (119, 178511), (137, 155057), (959, 22151), (1303, 16303), (2329, 9121)]