290627720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{81637}}^1$

素因数の和:81737

約数の個数: 32

約数和(自身を含む): 661267800

約数和(自身を除く): 370640080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 81637, 163274, 326548, 408185, 653096, 816370, 1632740, 3265480, 7265693, 14531386, 29062772, 36328465, 58125544, 72656930, 145313860, 290627720]

約数ペア:

[(1, 290627720), (2, 145313860), (4, 72656930), (5, 58125544), (8, 36328465), (10, 29062772), (20, 14531386), (40, 7265693), (89, 3265480), (178, 1632740), (356, 816370), (445, 653096), (712, 408185), (890, 326548), (1780, 163274), (3560, 81637)]