639920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:453

約数の個数: 40

約数和(自身を含む): 1569840

約数和(自身を除く): 929920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 421, 760, 842, 1520, 1684, 2105, 3368, 4210, 6736, 7999, 8420, 15998, 16840, 31996, 33680, 39995, 63992, 79990, 127984, 159980, 319960, 639920]

約数ペア:

[(1, 639920), (2, 319960), (4, 159980), (5, 127984), (8, 79990), (10, 63992), (16, 39995), (19, 33680), (20, 31996), (38, 16840), (40, 15998), (76, 8420), (80, 7999), (95, 6736), (152, 4210), (190, 3368), (304, 2105), (380, 1684), (421, 1520), (760, 842)]