217606460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{640019}}^1$

素因数の和:640045

約数の個数: 24

約数和(自身を含む): 483855120

約数和(自身を除く): 266248660

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 640019, 1280038, 2560076, 3200095, 6400190, 10880323, 12800380, 21760646, 43521292, 54401615, 108803230, 217606460]

約数ペア:

[(1, 217606460), (2, 108803230), (4, 54401615), (5, 43521292), (10, 21760646), (17, 12800380), (20, 10880323), (34, 6400190), (68, 3200095), (85, 2560076), (170, 1280038), (340, 640019)]