21424060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1117}}^1$

素因数の和:1270

約数の個数: 48

約数和(自身を含む): 51839424

約数和(自身を除く): 30415364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1117, 1370, 1918, 2234, 2740, 3836, 4468, 4795, 5585, 7819, 9590, 11170, 15638, 19180, 22340, 31276, 39095, 78190, 153029, 156380, 306058, 612116, 765145, 1071203, 1530290, 2142406, 3060580, 4284812, 5356015, 10712030, 21424060]

約数ペア:

[(1, 21424060), (2, 10712030), (4, 5356015), (5, 4284812), (7, 3060580), (10, 2142406), (14, 1530290), (20, 1071203), (28, 765145), (35, 612116), (70, 306058), (137, 156380), (140, 153029), (274, 78190), (548, 39095), (685, 31276), (959, 22340), (1117, 19180), (1370, 15638), (1918, 11170), (2234, 9590), (2740, 7819), (3836, 5585), (4468, 4795)]