21089025

素因数分解:

$3^3\times 5^2\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:375

約数の個数: 48

約数和(自身を含む): 39184000

約数和(自身を除く): 18094975

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 157, 199, 225, 471, 597, 675, 785, 995, 1413, 1791, 2355, 2985, 3925, 4239, 4975, 5373, 7065, 8955, 11775, 14925, 21195, 26865, 31243, 35325, 44775, 93729, 105975, 134325, 156215, 281187, 468645, 781075, 843561, 1405935, 2343225, 4217805, 7029675, 21089025]

約数ペア:

[(1, 21089025), (3, 7029675), (5, 4217805), (9, 2343225), (15, 1405935), (25, 843561), (27, 781075), (45, 468645), (75, 281187), (135, 156215), (157, 134325), (199, 105975), (225, 93729), (471, 44775), (597, 35325), (675, 31243), (785, 26865), (995, 21195), (1413, 14925), (1791, 11775), (2355, 8955), (2985, 7065), (3925, 5373), (4239, 4975)]