128709520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{51899}}^1$

素因数の和:51943

約数の個数: 40

約数和(自身を含む): 308908800

約数和(自身を除く): 180199280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 51899, 103798, 207596, 259495, 415192, 518990, 830384, 1037980, 1608869, 2075960, 3217738, 4151920, 6435476, 8044345, 12870952, 16088690, 25741904, 32177380, 64354760, 128709520]

約数ペア:

[(1, 128709520), (2, 64354760), (4, 32177380), (5, 25741904), (8, 16088690), (10, 12870952), (16, 8044345), (20, 6435476), (31, 4151920), (40, 3217738), (62, 2075960), (80, 1608869), (124, 1037980), (155, 830384), (248, 518990), (310, 415192), (496, 259495), (620, 207596), (1240, 103798), (2480, 51899)]