21991986

素因数分解:

$2^1\times 3^5\times {\mathrm{37}}^1\times {\mathrm{1223}}^1$

素因数の和:1277

約数の個数: 48

約数和(自身を含む): 50791104

約数和(自身を除く): 28799118

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 81, 111, 162, 222, 243, 333, 486, 666, 999, 1223, 1998, 2446, 2997, 3669, 5994, 7338, 8991, 11007, 17982, 22014, 33021, 45251, 66042, 90502, 99063, 135753, 198126, 271506, 297189, 407259, 594378, 814518, 1221777, 2443554, 3665331, 7330662, 10995993, 21991986]

約数ペア:

[(1, 21991986), (2, 10995993), (3, 7330662), (6, 3665331), (9, 2443554), (18, 1221777), (27, 814518), (37, 594378), (54, 407259), (74, 297189), (81, 271506), (111, 198126), (162, 135753), (222, 99063), (243, 90502), (333, 66042), (486, 45251), (666, 33021), (999, 22014), (1223, 17982), (1998, 11007), (2446, 8991), (2997, 7338), (3669, 5994)]