81113920

素因数分解:

$2^6\times 5^1\times {\mathrm{253481}}^1$

素因数の和:253498

約数の個数: 28

約数和(自身を含む): 193153284

約数和(自身を除く): 112039364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 253481, 506962, 1013924, 1267405, 2027848, 2534810, 4055696, 5069620, 8111392, 10139240, 16222784, 20278480, 40556960, 81113920]

約数ペア:

[(1, 81113920), (2, 40556960), (4, 20278480), (5, 16222784), (8, 10139240), (10, 8111392), (16, 5069620), (20, 4055696), (32, 2534810), (40, 2027848), (64, 1267405), (80, 1013924), (160, 506962), (320, 253481)]