20918720

素因数分解:

$2^6\times 5^1\times {\mathrm{65371}}^1$

素因数の和:65388

約数の個数: 28

約数和(自身を含む): 49813464

約数和(自身を除く): 28894744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65371, 130742, 261484, 326855, 522968, 653710, 1045936, 1307420, 2091872, 2614840, 4183744, 5229680, 10459360, 20918720]

約数ペア:

[(1, 20918720), (2, 10459360), (4, 5229680), (5, 4183744), (8, 2614840), (10, 2091872), (16, 1307420), (20, 1045936), (32, 653710), (40, 522968), (64, 326855), (80, 261484), (160, 130742), (320, 65371)]