128450320

素因数分解:

$2^4\times 5^1\times {\mathrm{1605629}}^1$

素因数の和:1605642

約数の個数: 20

約数和(自身を含む): 298647180

約数和(自身を除く): 170196860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605629, 3211258, 6422516, 8028145, 12845032, 16056290, 25690064, 32112580, 64225160, 128450320]

約数ペア:

[(1, 128450320), (2, 64225160), (4, 32112580), (5, 25690064), (8, 16056290), (10, 12845032), (16, 8028145), (20, 6422516), (40, 3211258), (80, 1605629)]