28725640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{8069}}^1$

素因数の和:8169

約数の個数: 32

約数和(自身を含む): 65367000

約数和(自身を除く): 36641360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 8069, 16138, 32276, 40345, 64552, 80690, 161380, 322760, 718141, 1436282, 2872564, 3590705, 5745128, 7181410, 14362820, 28725640]

約数ペア:

[(1, 28725640), (2, 14362820), (4, 7181410), (5, 5745128), (8, 3590705), (10, 2872564), (20, 1436282), (40, 718141), (89, 322760), (178, 161380), (356, 80690), (445, 64552), (712, 40345), (890, 32276), (1780, 16138), (3560, 8069)]