21728480

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{977}}^1$

素因数の和:1131

約数の個数: 48

約数和(自身を含む): 51755760

約数和(自身を除く): 30027280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 977, 1112, 1390, 1954, 2224, 2780, 3908, 4448, 4885, 5560, 7816, 9770, 11120, 15632, 19540, 22240, 31264, 39080, 78160, 135803, 156320, 271606, 543212, 679015, 1086424, 1358030, 2172848, 2716060, 4345696, 5432120, 10864240, 21728480]

約数ペア:

[(1, 21728480), (2, 10864240), (4, 5432120), (5, 4345696), (8, 2716060), (10, 2172848), (16, 1358030), (20, 1086424), (32, 679015), (40, 543212), (80, 271606), (139, 156320), (160, 135803), (278, 78160), (556, 39080), (695, 31264), (977, 22240), (1112, 19540), (1390, 15632), (1954, 11120), (2224, 9770), (2780, 7816), (3908, 5560), (4448, 4885)]