20680695

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{113}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 42574896

約数和(自身を除く): 21894201

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 83, 105, 113, 147, 245, 249, 315, 339, 415, 441, 565, 581, 735, 747, 791, 1017, 1245, 1695, 1743, 2205, 2373, 2905, 3735, 3955, 4067, 5085, 5229, 5537, 7119, 8715, 9379, 11865, 12201, 16611, 20335, 26145, 27685, 28137, 35595, 36603, 46895, 49833, 61005, 65653, 83055, 84411, 140685, 183015, 196959, 249165, 328265, 422055, 459571, 590877, 984795, 1378713, 2297855, 2954385, 4136139, 6893565, 20680695]

約数ペア:

[(1, 20680695), (3, 6893565), (5, 4136139), (7, 2954385), (9, 2297855), (15, 1378713), (21, 984795), (35, 590877), (45, 459571), (49, 422055), (63, 328265), (83, 249165), (105, 196959), (113, 183015), (147, 140685), (245, 84411), (249, 83055), (315, 65653), (339, 61005), (415, 49833), (441, 46895), (565, 36603), (581, 35595), (735, 28137), (747, 27685), (791, 26145), (1017, 20335), (1245, 16611), (1695, 12201), (1743, 11865), (2205, 9379), (2373, 8715), (2905, 7119), (3735, 5537), (3955, 5229), (4067, 5085)]