20861505

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9461}}^1$

素因数の和:9486

約数の個数: 36

約数和(自身を含む): 42068052

約数和(自身を除く): 21206547

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9461, 28383, 47305, 66227, 85149, 141915, 198681, 331135, 425745, 463589, 596043, 993405, 1390767, 2317945, 2980215, 4172301, 6953835, 20861505]

約数ペア:

[(1, 20861505), (3, 6953835), (5, 4172301), (7, 2980215), (9, 2317945), (15, 1390767), (21, 993405), (35, 596043), (45, 463589), (49, 425745), (63, 331135), (105, 198681), (147, 141915), (245, 85149), (315, 66227), (441, 47305), (735, 28383), (2205, 9461)]