20653160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:738

約数の個数: 64

約数和(自身を含む): 51468480

約数和(自身を除く): 30815320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 643, 730, 803, 1286, 1460, 1606, 2572, 2920, 3212, 3215, 4015, 5144, 6424, 6430, 7073, 8030, 12860, 14146, 16060, 25720, 28292, 32120, 35365, 46939, 56584, 70730, 93878, 141460, 187756, 234695, 282920, 375512, 469390, 516329, 938780, 1032658, 1877560, 2065316, 2581645, 4130632, 5163290, 10326580, 20653160]

約数ペア:

[(1, 20653160), (2, 10326580), (4, 5163290), (5, 4130632), (8, 2581645), (10, 2065316), (11, 1877560), (20, 1032658), (22, 938780), (40, 516329), (44, 469390), (55, 375512), (73, 282920), (88, 234695), (110, 187756), (146, 141460), (220, 93878), (292, 70730), (365, 56584), (440, 46939), (584, 35365), (643, 32120), (730, 28292), (803, 25720), (1286, 16060), (1460, 14146), (1606, 12860), (2572, 8030), (2920, 7073), (3212, 6430), (3215, 6424), (4015, 5144)]