81057560

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{499}}^1$

素因数の和:672

約数の個数: 64

約数和(自身を含む): 190080000

約数和(自身を除く): 109022440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 131, 155, 248, 262, 310, 499, 524, 620, 655, 998, 1048, 1240, 1310, 1996, 2495, 2620, 3992, 4061, 4990, 5240, 8122, 9980, 15469, 16244, 19960, 20305, 30938, 32488, 40610, 61876, 65369, 77345, 81220, 123752, 130738, 154690, 162440, 261476, 309380, 326845, 522952, 618760, 653690, 1307380, 2026439, 2614760, 4052878, 8105756, 10132195, 16211512, 20264390, 40528780, 81057560]

約数ペア:

[(1, 81057560), (2, 40528780), (4, 20264390), (5, 16211512), (8, 10132195), (10, 8105756), (20, 4052878), (31, 2614760), (40, 2026439), (62, 1307380), (124, 653690), (131, 618760), (155, 522952), (248, 326845), (262, 309380), (310, 261476), (499, 162440), (524, 154690), (620, 130738), (655, 123752), (998, 81220), (1048, 77345), (1240, 65369), (1310, 61876), (1996, 40610), (2495, 32488), (2620, 30938), (3992, 20305), (4061, 19960), (4990, 16244), (5240, 15469), (8122, 9980)]