19911525

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 35265600

約数和(自身を除く): 15354075

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 89, 95, 157, 267, 285, 445, 471, 475, 785, 1335, 1425, 1691, 2225, 2355, 2983, 3925, 5073, 6675, 8455, 8949, 11775, 13973, 14915, 25365, 41919, 42275, 44745, 69865, 74575, 126825, 209595, 223725, 265487, 349325, 796461, 1047975, 1327435, 3982305, 6637175, 19911525]

約数ペア:

[(1, 19911525), (3, 6637175), (5, 3982305), (15, 1327435), (19, 1047975), (25, 796461), (57, 349325), (75, 265487), (89, 223725), (95, 209595), (157, 126825), (267, 74575), (285, 69865), (445, 44745), (471, 42275), (475, 41919), (785, 25365), (1335, 14915), (1425, 13973), (1691, 11775), (2225, 8949), (2355, 8455), (2983, 6675), (3925, 5073)]