28078020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{401}}^1$

素因数の和:805

約数の個数: 72

約数和(自身を含む): 85601880

約数和(自身を除く): 57523860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 389, 401, 778, 802, 1167, 1203, 1556, 1604, 1945, 2005, 2334, 2406, 3501, 3609, 3890, 4010, 4668, 4812, 5835, 6015, 7002, 7218, 7780, 8020, 11670, 12030, 14004, 14436, 17505, 18045, 23340, 24060, 35010, 36090, 70020, 72180, 155989, 311978, 467967, 623956, 779945, 935934, 1403901, 1559890, 1871868, 2339835, 2807802, 3119780, 4679670, 5615604, 7019505, 9359340, 14039010, 28078020]

約数ペア:

[(1, 28078020), (2, 14039010), (3, 9359340), (4, 7019505), (5, 5615604), (6, 4679670), (9, 3119780), (10, 2807802), (12, 2339835), (15, 1871868), (18, 1559890), (20, 1403901), (30, 935934), (36, 779945), (45, 623956), (60, 467967), (90, 311978), (180, 155989), (389, 72180), (401, 70020), (778, 36090), (802, 35010), (1167, 24060), (1203, 23340), (1556, 18045), (1604, 17505), (1945, 14436), (2005, 14004), (2334, 12030), (2406, 11670), (3501, 8020), (3609, 7780), (3890, 7218), (4010, 7002), (4668, 6015), (4812, 5835)]