21690950

素因数分解:

$2^1\times 5^2\times {\mathrm{139}}^1\times {\mathrm{3121}}^1$

素因数の和:3272

約数の個数: 24

約数和(自身を含む): 40648440

約数和(自身を除く): 18957490

約数列:

[1, 2, 5, 10, 25, 50, 139, 278, 695, 1390, 3121, 3475, 6242, 6950, 15605, 31210, 78025, 156050, 433819, 867638, 2169095, 4338190, 10845475, 21690950]

約数ペア:

[(1, 21690950), (2, 10845475), (5, 4338190), (10, 2169095), (25, 867638), (50, 433819), (139, 156050), (278, 78025), (695, 31210), (1390, 15605), (3121, 6950), (3475, 6242)]