20905000

素因数分解:

$2^3\times 5^4\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:176

約数の個数: 80

約数和(自身を含む): 50749380

約数和(自身を除く): 29844380

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 37, 40, 50, 74, 100, 113, 125, 148, 185, 200, 226, 250, 296, 370, 452, 500, 565, 625, 740, 904, 925, 1000, 1130, 1250, 1480, 1850, 2260, 2500, 2825, 3700, 4181, 4520, 4625, 5000, 5650, 7400, 8362, 9250, 11300, 14125, 16724, 18500, 20905, 22600, 23125, 28250, 33448, 37000, 41810, 46250, 56500, 70625, 83620, 92500, 104525, 113000, 141250, 167240, 185000, 209050, 282500, 418100, 522625, 565000, 836200, 1045250, 2090500, 2613125, 4181000, 5226250, 10452500, 20905000]

約数ペア:

[(1, 20905000), (2, 10452500), (4, 5226250), (5, 4181000), (8, 2613125), (10, 2090500), (20, 1045250), (25, 836200), (37, 565000), (40, 522625), (50, 418100), (74, 282500), (100, 209050), (113, 185000), (125, 167240), (148, 141250), (185, 113000), (200, 104525), (226, 92500), (250, 83620), (296, 70625), (370, 56500), (452, 46250), (500, 41810), (565, 37000), (625, 33448), (740, 28250), (904, 23125), (925, 22600), (1000, 20905), (1130, 18500), (1250, 16724), (1480, 14125), (1850, 11300), (2260, 9250), (2500, 8362), (2825, 7400), (3700, 5650), (4181, 5000), (4520, 4625)]