21291218

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{19973}}^1$

素因数の和:20029

約数の個数: 16

約数和(自身を含む): 35234136

約数和(自身を除く): 13942918

約数列:

[1, 2, 13, 26, 41, 82, 533, 1066, 19973, 39946, 259649, 519298, 818893, 1637786, 10645609, 21291218]

約数ペア:

[(1, 21291218), (2, 10645609), (13, 1637786), (26, 818893), (41, 519298), (82, 259649), (533, 39946), (1066, 19973)]