290812840

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{81689}}^1$

素因数の和:81789

約数の個数: 32

約数和(自身を含む): 661689000

約数和(自身を除く): 370876160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 81689, 163378, 326756, 408445, 653512, 816890, 1633780, 3267560, 7270321, 14540642, 29081284, 36351605, 58162568, 72703210, 145406420, 290812840]

約数ペア:

[(1, 290812840), (2, 145406420), (4, 72703210), (5, 58162568), (8, 36351605), (10, 29081284), (20, 14540642), (40, 7270321), (89, 3267560), (178, 1633780), (356, 816890), (445, 653512), (712, 408445), (890, 326756), (1780, 163378), (3560, 81689)]