20847375

素因数分解:

$3^4\times 5^3\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:127

約数の個数: 80

約数和(自身を含む): 40772160

約数和(自身を除く): 19924785

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 45, 71, 75, 81, 87, 125, 135, 145, 213, 225, 261, 355, 375, 405, 435, 639, 675, 725, 783, 1065, 1125, 1305, 1775, 1917, 2025, 2059, 2175, 2349, 3195, 3375, 3625, 3915, 5325, 5751, 6177, 6525, 8875, 9585, 10125, 10295, 10875, 11745, 15975, 18531, 19575, 26625, 28755, 30885, 32625, 47925, 51475, 55593, 58725, 79875, 92655, 97875, 143775, 154425, 166779, 239625, 257375, 277965, 293625, 463275, 718875, 772125, 833895, 1389825, 2316375, 4169475, 6949125, 20847375]

約数ペア:

[(1, 20847375), (3, 6949125), (5, 4169475), (9, 2316375), (15, 1389825), (25, 833895), (27, 772125), (29, 718875), (45, 463275), (71, 293625), (75, 277965), (81, 257375), (87, 239625), (125, 166779), (135, 154425), (145, 143775), (213, 97875), (225, 92655), (261, 79875), (355, 58725), (375, 55593), (405, 51475), (435, 47925), (639, 32625), (675, 30885), (725, 28755), (783, 26625), (1065, 19575), (1125, 18531), (1305, 15975), (1775, 11745), (1917, 10875), (2025, 10295), (2059, 10125), (2175, 9585), (2349, 8875), (3195, 6525), (3375, 6177), (3625, 5751), (3915, 5325)]