21439240

素因数分解:

$2^3\times 5^1\times {\mathrm{607}}^1\times {\mathrm{883}}^1$

素因数の和:1501

約数の個数: 32

約数和(自身を含む): 48372480

約数和(自身を除く): 26933240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 607, 883, 1214, 1766, 2428, 3035, 3532, 4415, 4856, 6070, 7064, 8830, 12140, 17660, 24280, 35320, 535981, 1071962, 2143924, 2679905, 4287848, 5359810, 10719620, 21439240]

約数ペア:

[(1, 21439240), (2, 10719620), (4, 5359810), (5, 4287848), (8, 2679905), (10, 2143924), (20, 1071962), (40, 535981), (607, 35320), (883, 24280), (1214, 17660), (1766, 12140), (2428, 8830), (3035, 7064), (3532, 6070), (4415, 4856)]