20819025

素因数分解:

$3^5\times 5^2\times {\mathrm{23}}^1\times {\mathrm{149}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 40622400

約数和(自身を除く): 19803375

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 149, 207, 225, 243, 345, 405, 447, 575, 621, 675, 745, 1035, 1215, 1341, 1725, 1863, 2025, 2235, 3105, 3427, 3725, 4023, 5175, 5589, 6075, 6705, 9315, 10281, 11175, 12069, 15525, 17135, 20115, 27945, 30843, 33525, 36207, 46575, 51405, 60345, 85675, 92529, 100575, 139725, 154215, 181035, 257025, 277587, 301725, 462645, 771075, 832761, 905175, 1387935, 2313225, 4163805, 6939675, 20819025]

約数ペア:

[(1, 20819025), (3, 6939675), (5, 4163805), (9, 2313225), (15, 1387935), (23, 905175), (25, 832761), (27, 771075), (45, 462645), (69, 301725), (75, 277587), (81, 257025), (115, 181035), (135, 154215), (149, 139725), (207, 100575), (225, 92529), (243, 85675), (345, 60345), (405, 51405), (447, 46575), (575, 36207), (621, 33525), (675, 30843), (745, 27945), (1035, 20115), (1215, 17135), (1341, 15525), (1725, 12069), (1863, 11175), (2025, 10281), (2235, 9315), (3105, 6705), (3427, 6075), (3725, 5589), (4023, 5175)]