20899900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 52670240

約数和(自身を除く): 31770340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 73, 100, 140, 146, 175, 292, 350, 365, 409, 511, 700, 730, 818, 1022, 1460, 1636, 1825, 2044, 2045, 2555, 2863, 3650, 4090, 5110, 5726, 7300, 8180, 10220, 10225, 11452, 12775, 14315, 20450, 25550, 28630, 29857, 40900, 51100, 57260, 59714, 71575, 119428, 143150, 149285, 208999, 286300, 298570, 417998, 597140, 746425, 835996, 1044995, 1492850, 2089990, 2985700, 4179980, 5224975, 10449950, 20899900]

約数ペア:

[(1, 20899900), (2, 10449950), (4, 5224975), (5, 4179980), (7, 2985700), (10, 2089990), (14, 1492850), (20, 1044995), (25, 835996), (28, 746425), (35, 597140), (50, 417998), (70, 298570), (73, 286300), (100, 208999), (140, 149285), (146, 143150), (175, 119428), (292, 71575), (350, 59714), (365, 57260), (409, 51100), (511, 40900), (700, 29857), (730, 28630), (818, 25550), (1022, 20450), (1460, 14315), (1636, 12775), (1825, 11452), (2044, 10225), (2045, 10220), (2555, 8180), (2863, 7300), (3650, 5726), (4090, 5110)]