20865375

素因数分解:

$3^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{1091}}^1$

素因数の和:1129

約数の個数: 48

約数和(自身を含む): 39862368

約数和(自身を除く): 18996993

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 125, 153, 225, 255, 375, 425, 765, 1091, 1125, 1275, 2125, 3273, 3825, 5455, 6375, 9819, 16365, 18547, 19125, 27275, 49095, 55641, 81825, 92735, 136375, 166923, 245475, 278205, 409125, 463675, 834615, 1227375, 1391025, 2318375, 4173075, 6955125, 20865375]

約数ペア:

[(1, 20865375), (3, 6955125), (5, 4173075), (9, 2318375), (15, 1391025), (17, 1227375), (25, 834615), (45, 463675), (51, 409125), (75, 278205), (85, 245475), (125, 166923), (153, 136375), (225, 92735), (255, 81825), (375, 55641), (425, 49095), (765, 27275), (1091, 19125), (1125, 18547), (1275, 16365), (2125, 9819), (3273, 6375), (3825, 5455)]