20434640

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1427}}^1$

素因数の和:1619

約数の個数: 40

約数和(自身を含む): 47809440

約数和(自身を除く): 27374800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1427, 1432, 1790, 2854, 2864, 3580, 5708, 7135, 7160, 11416, 14270, 14320, 22832, 28540, 57080, 114160, 255433, 510866, 1021732, 1277165, 2043464, 2554330, 4086928, 5108660, 10217320, 20434640]

約数ペア:

[(1, 20434640), (2, 10217320), (4, 5108660), (5, 4086928), (8, 2554330), (10, 2043464), (16, 1277165), (20, 1021732), (40, 510866), (80, 255433), (179, 114160), (358, 57080), (716, 28540), (895, 22832), (1427, 14320), (1432, 14270), (1790, 11416), (2854, 7160), (2864, 7135), (3580, 5708)]