20937980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{431}}^1$

素因数の和:794

約数の個数: 48

約数和(自身を含む): 50512896

約数和(自身を除く): 29574916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 347, 431, 694, 862, 1388, 1724, 1735, 2155, 2429, 3017, 3470, 4310, 4858, 6034, 6940, 8620, 9716, 12068, 12145, 15085, 24290, 30170, 48580, 60340, 149557, 299114, 598228, 747785, 1046899, 1495570, 2093798, 2991140, 4187596, 5234495, 10468990, 20937980]

約数ペア:

[(1, 20937980), (2, 10468990), (4, 5234495), (5, 4187596), (7, 2991140), (10, 2093798), (14, 1495570), (20, 1046899), (28, 747785), (35, 598228), (70, 299114), (140, 149557), (347, 60340), (431, 48580), (694, 30170), (862, 24290), (1388, 15085), (1724, 12145), (1735, 12068), (2155, 9716), (2429, 8620), (3017, 6940), (3470, 6034), (4310, 4858)]