20922860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{751}}^1$

素因数の和:966

約数の個数: 48

約数和(自身を含む): 50534400

約数和(自身を除く): 29611540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 751, 796, 995, 1393, 1502, 1990, 2786, 3004, 3755, 3980, 5257, 5572, 6965, 7510, 10514, 13930, 15020, 21028, 26285, 27860, 52570, 105140, 149449, 298898, 597796, 747245, 1046143, 1494490, 2092286, 2988980, 4184572, 5230715, 10461430, 20922860]

約数ペア:

[(1, 20922860), (2, 10461430), (4, 5230715), (5, 4184572), (7, 2988980), (10, 2092286), (14, 1494490), (20, 1046143), (28, 747245), (35, 597796), (70, 298898), (140, 149449), (199, 105140), (398, 52570), (751, 27860), (796, 26285), (995, 21028), (1393, 15020), (1502, 13930), (1990, 10514), (2786, 7510), (3004, 6965), (3755, 5572), (3980, 5257)]