21120945

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{563}}^1$

素因数の和:673

約数の個数: 32

約数和(自身を含む): 35247744

約数和(自身を除く): 14126799

約数列:

[1, 3, 5, 15, 41, 61, 123, 183, 205, 305, 563, 615, 915, 1689, 2501, 2815, 7503, 8445, 12505, 23083, 34343, 37515, 69249, 103029, 115415, 171715, 346245, 515145, 1408063, 4224189, 7040315, 21120945]

約数ペア:

[(1, 21120945), (3, 7040315), (5, 4224189), (15, 1408063), (41, 515145), (61, 346245), (123, 171715), (183, 115415), (205, 103029), (305, 69249), (563, 37515), (615, 34343), (915, 23083), (1689, 12505), (2501, 8445), (2815, 7503)]