21756464

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{79987}}^1$

素因数の和:80012

約数の個数: 20

約数和(自身を含む): 44633304

約数和(自身を除く): 22876840

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 79987, 159974, 319948, 639896, 1279792, 1359779, 2719558, 5439116, 10878232, 21756464]

約数ペア:

[(1, 21756464), (2, 10878232), (4, 5439116), (8, 2719558), (16, 1359779), (17, 1279792), (34, 639896), (68, 319948), (136, 159974), (272, 79987)]