20005240

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{773}}^1$

素因数の和:1431

約数の個数: 32

約数和(自身を含む): 45139680

約数和(自身を除く): 25134440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 773, 1294, 1546, 2588, 3092, 3235, 3865, 5176, 6184, 6470, 7730, 12940, 15460, 25880, 30920, 500131, 1000262, 2000524, 2500655, 4001048, 5001310, 10002620, 20005240]

約数ペア:

[(1, 20005240), (2, 10002620), (4, 5001310), (5, 4001048), (8, 2500655), (10, 2000524), (20, 1000262), (40, 500131), (647, 30920), (773, 25880), (1294, 15460), (1546, 12940), (2588, 7730), (3092, 6470), (3235, 6184), (3865, 5176)]