20899755

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18913365

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 53, 69, 115, 127, 135, 159, 207, 265, 345, 381, 477, 621, 635, 795, 1035, 1143, 1219, 1431, 1905, 2385, 2921, 3105, 3429, 3657, 5715, 6095, 6731, 7155, 8763, 10971, 14605, 17145, 18285, 20193, 26289, 32913, 33655, 43815, 54855, 60579, 78867, 100965, 131445, 154813, 164565, 181737, 302895, 394335, 464439, 774065, 908685, 1393317, 2322195, 4179951, 6966585, 20899755]

約数ペア:

[(1, 20899755), (3, 6966585), (5, 4179951), (9, 2322195), (15, 1393317), (23, 908685), (27, 774065), (45, 464439), (53, 394335), (69, 302895), (115, 181737), (127, 164565), (135, 154813), (159, 131445), (207, 100965), (265, 78867), (345, 60579), (381, 54855), (477, 43815), (621, 33655), (635, 32913), (795, 26289), (1035, 20193), (1143, 18285), (1219, 17145), (1431, 14605), (1905, 10971), (2385, 8763), (2921, 7155), (3105, 6731), (3429, 6095), (3657, 5715)]