21400406

素因数分解:

$2^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{1103}}^1$

素因数の和:1303

約数の個数: 16

約数和(自身を含む): 32788800

約数和(自身を除く): 11388394

約数列:

[1, 2, 89, 109, 178, 218, 1103, 2206, 9701, 19402, 98167, 120227, 196334, 240454, 10700203, 21400406]

約数ペア:

[(1, 21400406), (2, 10700203), (89, 240454), (109, 196334), (178, 120227), (218, 98167), (1103, 19402), (2206, 9701)]