65640320

素因数分解:

$2^7\times 5^1\times {\mathrm{102563}}^1$

素因数の和:102582

約数の個数: 32

約数和(自身を含む): 156922920

約数和(自身を除く): 91282600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 102563, 205126, 410252, 512815, 820504, 1025630, 1641008, 2051260, 3282016, 4102520, 6564032, 8205040, 13128064, 16410080, 32820160, 65640320]

約数ペア:

[(1, 65640320), (2, 32820160), (4, 16410080), (5, 13128064), (8, 8205040), (10, 6564032), (16, 4102520), (20, 3282016), (32, 2051260), (40, 1641008), (64, 1025630), (80, 820504), (128, 512815), (160, 410252), (320, 205126), (640, 102563)]