20871718

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{1223}}^1$

素因数の和:1308

約数の個数: 32

約数和(自身を含む): 38071296

約数和(自身を除く): 17199578

約数列:

[1, 2, 7, 14, 23, 46, 53, 106, 161, 322, 371, 742, 1219, 1223, 2438, 2446, 8533, 8561, 17066, 17122, 28129, 56258, 64819, 129638, 196903, 393806, 453733, 907466, 1490837, 2981674, 10435859, 20871718]

約数ペア:

[(1, 20871718), (2, 10435859), (7, 2981674), (14, 1490837), (23, 907466), (46, 453733), (53, 393806), (106, 196903), (161, 129638), (322, 64819), (371, 56258), (742, 28129), (1219, 17122), (1223, 17066), (2438, 8561), (2446, 8533)]