20938240

素因数分解:

$2^9\times 5^1\times {\mathrm{8179}}^1$

素因数の和:8202

約数の個数: 40

約数和(自身を含む): 50208840

約数和(自身を除く): 29270600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8179, 16358, 32716, 40895, 65432, 81790, 130864, 163580, 261728, 327160, 523456, 654320, 1046912, 1308640, 2093824, 2617280, 4187648, 5234560, 10469120, 20938240]

約数ペア:

[(1, 20938240), (2, 10469120), (4, 5234560), (5, 4187648), (8, 2617280), (10, 2093824), (16, 1308640), (20, 1046912), (32, 654320), (40, 523456), (64, 327160), (80, 261728), (128, 163580), (160, 130864), (256, 81790), (320, 65432), (512, 40895), (640, 32716), (1280, 16358), (2560, 8179)]