20976215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{463}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 29465856

約数和(自身を除く): 8489641

約数列:

[1, 5, 13, 17, 41, 65, 85, 205, 221, 463, 533, 697, 1105, 2315, 2665, 3485, 6019, 7871, 9061, 18983, 30095, 39355, 45305, 94915, 102323, 246779, 322711, 511615, 1233895, 1613555, 4195243, 20976215]

約数ペア:

[(1, 20976215), (5, 4195243), (13, 1613555), (17, 1233895), (41, 511615), (65, 322711), (85, 246779), (205, 102323), (221, 94915), (463, 45305), (533, 39355), (697, 30095), (1105, 18983), (2315, 9061), (2665, 7871), (3485, 6019)]