21490240

素因数分解:

$2^6\times 5^1\times {\mathrm{67157}}^1$

素因数の和:67174

約数の個数: 28

約数和(自身を含む): 51174396

約数和(自身を除く): 29684156

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67157, 134314, 268628, 335785, 537256, 671570, 1074512, 1343140, 2149024, 2686280, 4298048, 5372560, 10745120, 21490240]

約数ペア:

[(1, 21490240), (2, 10745120), (4, 5372560), (5, 4298048), (8, 2686280), (10, 2149024), (16, 1343140), (20, 1074512), (32, 671570), (40, 537256), (64, 335785), (80, 268628), (160, 134314), (320, 67157)]