21474460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{977}}^1$

素因数の和:1150

約数の個数: 48

約数和(自身を含む): 51920064

約数和(自身を除く): 30445604

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 977, 1099, 1570, 1954, 2198, 3140, 3908, 4396, 4885, 5495, 6839, 9770, 10990, 13678, 19540, 21980, 27356, 34195, 68390, 136780, 153389, 306778, 613556, 766945, 1073723, 1533890, 2147446, 3067780, 4294892, 5368615, 10737230, 21474460]

約数ペア:

[(1, 21474460), (2, 10737230), (4, 5368615), (5, 4294892), (7, 3067780), (10, 2147446), (14, 1533890), (20, 1073723), (28, 766945), (35, 613556), (70, 306778), (140, 153389), (157, 136780), (314, 68390), (628, 34195), (785, 27356), (977, 21980), (1099, 19540), (1570, 13678), (1954, 10990), (2198, 9770), (3140, 6839), (3908, 5495), (4396, 4885)]