21134480

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3943}}^1$

素因数の和:4023

約数の個数: 40

約数和(自身を含む): 49883712

約数和(自身を除く): 28749232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3943, 5360, 7886, 15772, 19715, 31544, 39430, 63088, 78860, 157720, 264181, 315440, 528362, 1056724, 1320905, 2113448, 2641810, 4226896, 5283620, 10567240, 21134480]

約数ペア:

[(1, 21134480), (2, 10567240), (4, 5283620), (5, 4226896), (8, 2641810), (10, 2113448), (16, 1320905), (20, 1056724), (40, 528362), (67, 315440), (80, 264181), (134, 157720), (268, 78860), (335, 63088), (536, 39430), (670, 31544), (1072, 19715), (1340, 15772), (2680, 7886), (3943, 5360)]