21460720

素因数分解:

$2^4\times 5^1\times {\mathrm{457}}^1\times {\mathrm{587}}^1$

素因数の和:1057

約数の個数: 40

約数和(自身を含む): 50090544

約数和(自身を除く): 28629824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 457, 587, 914, 1174, 1828, 2285, 2348, 2935, 3656, 4570, 4696, 5870, 7312, 9140, 9392, 11740, 18280, 23480, 36560, 46960, 268259, 536518, 1073036, 1341295, 2146072, 2682590, 4292144, 5365180, 10730360, 21460720]

約数ペア:

[(1, 21460720), (2, 10730360), (4, 5365180), (5, 4292144), (8, 2682590), (10, 2146072), (16, 1341295), (20, 1073036), (40, 536518), (80, 268259), (457, 46960), (587, 36560), (914, 23480), (1174, 18280), (1828, 11740), (2285, 9392), (2348, 9140), (2935, 7312), (3656, 5870), (4570, 4696)]