21484480

素因数分解:

$2^6\times 5^1\times {\mathrm{67139}}^1$

素因数の和:67156

約数の個数: 28

約数和(自身を含む): 51160680

約数和(自身を除く): 29676200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67139, 134278, 268556, 335695, 537112, 671390, 1074224, 1342780, 2148448, 2685560, 4296896, 5371120, 10742240, 21484480]

約数ペア:

[(1, 21484480), (2, 10742240), (4, 5371120), (5, 4296896), (8, 2685560), (10, 2148448), (16, 1342780), (20, 1074224), (32, 671390), (40, 537112), (64, 335695), (80, 268556), (160, 134278), (320, 67139)]