639801515

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{401}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 811242432

約数和(自身を除く): 171440917

約数列:

[1, 5, 41, 43, 181, 205, 215, 401, 905, 1763, 2005, 7421, 7783, 8815, 16441, 17243, 37105, 38915, 72581, 82205, 86215, 319103, 362905, 706963, 1595515, 2975821, 3120983, 3534815, 14879105, 15604915, 127960303, 639801515]

約数ペア:

[(1, 639801515), (5, 127960303), (41, 15604915), (43, 14879105), (181, 3534815), (205, 3120983), (215, 2975821), (401, 1595515), (905, 706963), (1763, 362905), (2005, 319103), (7421, 86215), (7783, 82205), (8815, 72581), (16441, 38915), (17243, 37105)]