21509910

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1201}}^1$

素因数の和:1413

約数の個数: 48

約数和(自身を含む): 56253600

約数和(自身を除く): 34743690

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 199, 398, 597, 995, 1194, 1201, 1791, 1990, 2402, 2985, 3582, 3603, 5970, 6005, 7206, 8955, 10809, 12010, 17910, 18015, 21618, 36030, 54045, 108090, 238999, 477998, 716997, 1194995, 1433994, 2150991, 2389990, 3584985, 4301982, 7169970, 10754955, 21509910]

約数ペア:

[(1, 21509910), (2, 10754955), (3, 7169970), (5, 4301982), (6, 3584985), (9, 2389990), (10, 2150991), (15, 1433994), (18, 1194995), (30, 716997), (45, 477998), (90, 238999), (199, 108090), (398, 54045), (597, 36030), (995, 21618), (1194, 18015), (1201, 17910), (1791, 12010), (1990, 10809), (2402, 8955), (2985, 7206), (3582, 6005), (3603, 5970)]