1640872880

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{306133}}^1$

素因数の和:306213

約数の個数: 40

約数和(自身を含む): 3871982832

約数和(自身を除く): 2231109952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 5360, 306133, 612266, 1224532, 1530665, 2449064, 3061330, 4898128, 6122660, 12245320, 20510911, 24490640, 41021822, 82043644, 102554555, 164087288, 205109110, 328174576, 410218220, 820436440, 1640872880]

約数ペア:

[(1, 1640872880), (2, 820436440), (4, 410218220), (5, 328174576), (8, 205109110), (10, 164087288), (16, 102554555), (20, 82043644), (40, 41021822), (67, 24490640), (80, 20510911), (134, 12245320), (268, 6122660), (335, 4898128), (536, 3061330), (670, 2449064), (1072, 1530665), (1340, 1224532), (2680, 612266), (5360, 306133)]