20421135

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{269}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 40772160

約数和(自身を除く): 20351025

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 241, 269, 315, 723, 807, 1205, 1345, 1687, 1883, 2169, 2421, 3615, 4035, 5061, 5649, 8435, 9415, 10845, 12105, 15183, 16947, 25305, 28245, 64829, 75915, 84735, 194487, 324145, 453803, 583461, 972435, 1361409, 2269015, 2917305, 4084227, 6807045, 20421135]

約数ペア:

[(1, 20421135), (3, 6807045), (5, 4084227), (7, 2917305), (9, 2269015), (15, 1361409), (21, 972435), (35, 583461), (45, 453803), (63, 324145), (105, 194487), (241, 84735), (269, 75915), (315, 64829), (723, 28245), (807, 25305), (1205, 16947), (1345, 15183), (1687, 12105), (1883, 10845), (2169, 9415), (2421, 8435), (3615, 5649), (4035, 5061)]