21698240

素因数分解:

$2^6\times 5^1\times {\mathrm{67807}}^1$

素因数の和:67824

約数の個数: 28

約数和(自身を含む): 51669696

約数和(自身を除く): 29971456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67807, 135614, 271228, 339035, 542456, 678070, 1084912, 1356140, 2169824, 2712280, 4339648, 5424560, 10849120, 21698240]

約数ペア:

[(1, 21698240), (2, 10849120), (4, 5424560), (5, 4339648), (8, 2712280), (10, 2169824), (16, 1356140), (20, 1084912), (32, 678070), (40, 542456), (64, 339035), (80, 271228), (160, 135614), (320, 67807)]