20177535

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 39029760

約数和(自身を除く): 18852225

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 43, 105, 109, 123, 129, 205, 215, 287, 301, 327, 545, 615, 645, 763, 861, 903, 1435, 1505, 1635, 1763, 2289, 3815, 4305, 4469, 4515, 4687, 5289, 8815, 11445, 12341, 13407, 14061, 22345, 23435, 26445, 31283, 32809, 37023, 61705, 67035, 70305, 93849, 98427, 156415, 164045, 185115, 192167, 469245, 492135, 576501, 960835, 1345169, 2882505, 4035507, 6725845, 20177535]

約数ペア:

[(1, 20177535), (3, 6725845), (5, 4035507), (7, 2882505), (15, 1345169), (21, 960835), (35, 576501), (41, 492135), (43, 469245), (105, 192167), (109, 185115), (123, 164045), (129, 156415), (205, 98427), (215, 93849), (287, 70305), (301, 67035), (327, 61705), (545, 37023), (615, 32809), (645, 31283), (763, 26445), (861, 23435), (903, 22345), (1435, 14061), (1505, 13407), (1635, 12341), (1763, 11445), (2289, 8815), (3815, 5289), (4305, 4687), (4469, 4515)]