20795985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{617}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 41648256

約数和(自身を除く): 20852271

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 107, 315, 321, 535, 617, 749, 963, 1605, 1851, 2247, 3085, 3745, 4319, 4815, 5553, 6741, 9255, 11235, 12957, 21595, 27765, 33705, 38871, 64785, 66019, 194355, 198057, 330095, 462133, 594171, 990285, 1386399, 2310665, 2970855, 4159197, 6931995, 20795985]

約数ペア:

[(1, 20795985), (3, 6931995), (5, 4159197), (7, 2970855), (9, 2310665), (15, 1386399), (21, 990285), (35, 594171), (45, 462133), (63, 330095), (105, 198057), (107, 194355), (315, 66019), (321, 64785), (535, 38871), (617, 33705), (749, 27765), (963, 21595), (1605, 12957), (1851, 11235), (2247, 9255), (3085, 6741), (3745, 5553), (4319, 4815)]