20213900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{431}}^1$

素因数の和:519

約数の個数: 72

約数和(自身を含む): 50996736

約数和(自身を除く): 30782836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 67, 70, 100, 134, 140, 175, 268, 335, 350, 431, 469, 670, 700, 862, 938, 1340, 1675, 1724, 1876, 2155, 2345, 3017, 3350, 4310, 4690, 6034, 6700, 8620, 9380, 10775, 11725, 12068, 15085, 21550, 23450, 28877, 30170, 43100, 46900, 57754, 60340, 75425, 115508, 144385, 150850, 202139, 288770, 301700, 404278, 577540, 721925, 808556, 1010695, 1443850, 2021390, 2887700, 4042780, 5053475, 10106950, 20213900]

約数ペア:

[(1, 20213900), (2, 10106950), (4, 5053475), (5, 4042780), (7, 2887700), (10, 2021390), (14, 1443850), (20, 1010695), (25, 808556), (28, 721925), (35, 577540), (50, 404278), (67, 301700), (70, 288770), (100, 202139), (134, 150850), (140, 144385), (175, 115508), (268, 75425), (335, 60340), (350, 57754), (431, 46900), (469, 43100), (670, 30170), (700, 28877), (862, 23450), (938, 21550), (1340, 15085), (1675, 12068), (1724, 11725), (1876, 10775), (2155, 9380), (2345, 8620), (3017, 6700), (3350, 6034), (4310, 4690)]