521009860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{18701}}^1$

素因数の和:18916

約数の個数: 48

約数和(自身を含む): 1256774400

約数和(自身を除く): 735764540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 398, 796, 995, 1393, 1990, 2786, 3980, 5572, 6965, 13930, 18701, 27860, 37402, 74804, 93505, 130907, 187010, 261814, 374020, 523628, 654535, 1309070, 2618140, 3721499, 7442998, 14885996, 18607495, 26050493, 37214990, 52100986, 74429980, 104201972, 130252465, 260504930, 521009860]

約数ペア:

[(1, 521009860), (2, 260504930), (4, 130252465), (5, 104201972), (7, 74429980), (10, 52100986), (14, 37214990), (20, 26050493), (28, 18607495), (35, 14885996), (70, 7442998), (140, 3721499), (199, 2618140), (398, 1309070), (796, 654535), (995, 523628), (1393, 374020), (1990, 261814), (2786, 187010), (3980, 130907), (5572, 93505), (6965, 74804), (13930, 37402), (18701, 27860)]