18879920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{12421}}^1$

素因数の和:12453

約数の個数: 40

約数和(自身を含む): 46209840

約数和(自身を除く): 27329920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 12421, 24842, 49684, 62105, 99368, 124210, 198736, 235999, 248420, 471998, 496840, 943996, 993680, 1179995, 1887992, 2359990, 3775984, 4719980, 9439960, 18879920]

約数ペア:

[(1, 18879920), (2, 9439960), (4, 4719980), (5, 3775984), (8, 2359990), (10, 1887992), (16, 1179995), (19, 993680), (20, 943996), (38, 496840), (40, 471998), (76, 248420), (80, 235999), (95, 198736), (152, 124210), (190, 99368), (304, 62105), (380, 49684), (760, 24842), (1520, 12421)]