20490500

素因数分解:

$2^2\times 5^3\times {\mathrm{107}}^1\times {\mathrm{383}}^1$

素因数の和:509

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 24796924

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 107, 125, 214, 250, 383, 428, 500, 535, 766, 1070, 1532, 1915, 2140, 2675, 3830, 5350, 7660, 9575, 10700, 13375, 19150, 26750, 38300, 40981, 47875, 53500, 81962, 95750, 163924, 191500, 204905, 409810, 819620, 1024525, 2049050, 4098100, 5122625, 10245250, 20490500]

約数ペア:

[(1, 20490500), (2, 10245250), (4, 5122625), (5, 4098100), (10, 2049050), (20, 1024525), (25, 819620), (50, 409810), (100, 204905), (107, 191500), (125, 163924), (214, 95750), (250, 81962), (383, 53500), (428, 47875), (500, 40981), (535, 38300), (766, 26750), (1070, 19150), (1532, 13375), (1915, 10700), (2140, 9575), (2675, 7660), (3830, 5350)]