64704560

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19727}}^1$

素因数の和:19781

約数の個数: 40

約数和(自身を含む): 154115136

約数和(自身を除く): 89410576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 19727, 39454, 78908, 98635, 157816, 197270, 315632, 394540, 789080, 808807, 1578160, 1617614, 3235228, 4044035, 6470456, 8088070, 12940912, 16176140, 32352280, 64704560]

約数ペア:

[(1, 64704560), (2, 32352280), (4, 16176140), (5, 12940912), (8, 8088070), (10, 6470456), (16, 4044035), (20, 3235228), (40, 1617614), (41, 1578160), (80, 808807), (82, 789080), (164, 394540), (205, 315632), (328, 197270), (410, 157816), (656, 98635), (820, 78908), (1640, 39454), (3280, 19727)]