68951380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{431}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 153135360

約数和(自身を除く): 84183980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 421, 431, 842, 862, 1684, 1724, 2105, 2155, 4210, 4310, 7999, 8189, 8420, 8620, 15998, 16378, 31996, 32756, 39995, 40945, 79990, 81890, 159980, 163780, 181451, 362902, 725804, 907255, 1814510, 3447569, 3629020, 6895138, 13790276, 17237845, 34475690, 68951380]

約数ペア:

[(1, 68951380), (2, 34475690), (4, 17237845), (5, 13790276), (10, 6895138), (19, 3629020), (20, 3447569), (38, 1814510), (76, 907255), (95, 725804), (190, 362902), (380, 181451), (421, 163780), (431, 159980), (842, 81890), (862, 79990), (1684, 40945), (1724, 39995), (2105, 32756), (2155, 31996), (4210, 16378), (4310, 15998), (7999, 8620), (8189, 8420)]