21070868

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{541}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 45892224

約数和(自身を除く): 24821356

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 107, 182, 214, 364, 428, 541, 749, 1082, 1391, 1498, 2164, 2782, 2996, 3787, 5564, 7033, 7574, 9737, 14066, 15148, 19474, 28132, 38948, 49231, 57887, 98462, 115774, 196924, 231548, 405209, 752531, 810418, 1505062, 1620836, 3010124, 5267717, 10535434, 21070868]

約数ペア:

[(1, 21070868), (2, 10535434), (4, 5267717), (7, 3010124), (13, 1620836), (14, 1505062), (26, 810418), (28, 752531), (52, 405209), (91, 231548), (107, 196924), (182, 115774), (214, 98462), (364, 57887), (428, 49231), (541, 38948), (749, 28132), (1082, 19474), (1391, 15148), (1498, 14066), (2164, 9737), (2782, 7574), (2996, 7033), (3787, 5564)]