20421900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{22691}}^1$

素因数の和:22711

約数の個数: 54

約数和(自身を含む): 64014132

約数和(自身を除く): 43592232

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900, 22691, 45382, 68073, 90764, 113455, 136146, 204219, 226910, 272292, 340365, 408438, 453820, 567275, 680730, 816876, 1021095, 1134550, 1361460, 1701825, 2042190, 2269100, 3403650, 4084380, 5105475, 6807300, 10210950, 20421900]

約数ペア:

[(1, 20421900), (2, 10210950), (3, 6807300), (4, 5105475), (5, 4084380), (6, 3403650), (9, 2269100), (10, 2042190), (12, 1701825), (15, 1361460), (18, 1134550), (20, 1021095), (25, 816876), (30, 680730), (36, 567275), (45, 453820), (50, 408438), (60, 340365), (75, 272292), (90, 226910), (100, 204219), (150, 136146), (180, 113455), (225, 90764), (300, 68073), (450, 45382), (900, 22691)]