21234560

素因数分解:

$2^7\times 5^1\times {\mathrm{33179}}^1$

素因数の和:33198

約数の個数: 32

約数和(自身を含む): 50765400

約数和(自身を除く): 29530840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33179, 66358, 132716, 165895, 265432, 331790, 530864, 663580, 1061728, 1327160, 2123456, 2654320, 4246912, 5308640, 10617280, 21234560]

約数ペア:

[(1, 21234560), (2, 10617280), (4, 5308640), (5, 4246912), (8, 2654320), (10, 2123456), (16, 1327160), (20, 1061728), (32, 663580), (40, 530864), (64, 331790), (80, 265432), (128, 165895), (160, 132716), (320, 66358), (640, 33179)]