217775560

素因数分解:

$2^3\times 5^1\times {\mathrm{691}}^1\times {\mathrm{7879}}^1$

素因数の和:8581

約数の個数: 32

約数和(自身を含む): 490766400

約数和(自身を除く): 272990840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 691, 1382, 2764, 3455, 5528, 6910, 7879, 13820, 15758, 27640, 31516, 39395, 63032, 78790, 157580, 315160, 5444389, 10888778, 21777556, 27221945, 43555112, 54443890, 108887780, 217775560]

約数ペア:

[(1, 217775560), (2, 108887780), (4, 54443890), (5, 43555112), (8, 27221945), (10, 21777556), (20, 10888778), (40, 5444389), (691, 315160), (1382, 157580), (2764, 78790), (3455, 63032), (5528, 39395), (6910, 31516), (7879, 27640), (13820, 15758)]