21290240

素因数分解:

$2^8\times 5^1\times {\mathrm{16633}}^1$

素因数の和:16654

約数の個数: 36

約数和(自身を含む): 50999844

約数和(自身を除く): 29709604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16633, 33266, 66532, 83165, 133064, 166330, 266128, 332660, 532256, 665320, 1064512, 1330640, 2129024, 2661280, 4258048, 5322560, 10645120, 21290240]

約数ペア:

[(1, 21290240), (2, 10645120), (4, 5322560), (5, 4258048), (8, 2661280), (10, 2129024), (16, 1330640), (20, 1064512), (32, 665320), (40, 532256), (64, 332660), (80, 266128), (128, 166330), (160, 133064), (256, 83165), (320, 66532), (640, 33266), (1280, 16633)]