20286700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:491

約数の個数: 72

約数和(自身を含む): 51128672

約数和(自身を除く): 30841972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 73, 100, 140, 146, 175, 292, 350, 365, 397, 511, 700, 730, 794, 1022, 1460, 1588, 1825, 1985, 2044, 2555, 2779, 3650, 3970, 5110, 5558, 7300, 7940, 9925, 10220, 11116, 12775, 13895, 19850, 25550, 27790, 28981, 39700, 51100, 55580, 57962, 69475, 115924, 138950, 144905, 202867, 277900, 289810, 405734, 579620, 724525, 811468, 1014335, 1449050, 2028670, 2898100, 4057340, 5071675, 10143350, 20286700]

約数ペア:

[(1, 20286700), (2, 10143350), (4, 5071675), (5, 4057340), (7, 2898100), (10, 2028670), (14, 1449050), (20, 1014335), (25, 811468), (28, 724525), (35, 579620), (50, 405734), (70, 289810), (73, 277900), (100, 202867), (140, 144905), (146, 138950), (175, 115924), (292, 69475), (350, 57962), (365, 55580), (397, 51100), (511, 39700), (700, 28981), (730, 27790), (794, 25550), (1022, 19850), (1460, 13895), (1588, 12775), (1825, 11116), (1985, 10220), (2044, 9925), (2555, 7940), (2779, 7300), (3650, 5558), (3970, 5110)]