278297680

素因数分解:

$2^4\times 5^1\times {\mathrm{3478721}}^1$

素因数の和:3478734

約数の個数: 20

約数和(自身を含む): 647042292

約数和(自身を除く): 368744612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3478721, 6957442, 13914884, 17393605, 27829768, 34787210, 55659536, 69574420, 139148840, 278297680]

約数ペア:

[(1, 278297680), (2, 139148840), (4, 69574420), (5, 55659536), (8, 34787210), (10, 27829768), (16, 17393605), (20, 13914884), (40, 6957442), (80, 3478721)]