21431870

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1\times {\mathrm{281}}^1$

素因数の和:580

約数の個数: 32

約数和(自身を含む): 40201920

約数和(自身を除く): 18770050

約数列:

[1, 2, 5, 10, 29, 58, 145, 263, 281, 290, 526, 562, 1315, 1405, 2630, 2810, 7627, 8149, 15254, 16298, 38135, 40745, 73903, 76270, 81490, 147806, 369515, 739030, 2143187, 4286374, 10715935, 21431870]

約数ペア:

[(1, 21431870), (2, 10715935), (5, 4286374), (10, 2143187), (29, 739030), (58, 369515), (145, 147806), (263, 81490), (281, 76270), (290, 73903), (526, 40745), (562, 38135), (1315, 16298), (1405, 15254), (2630, 8149), (2810, 7627)]