21130725

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3659}}^1$

素因数の和:3690

約数の個数: 48

約数和(自身を含む): 43568640

約数和(自身を除く): 22437915

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 55, 75, 77, 105, 165, 175, 231, 275, 385, 525, 825, 1155, 1925, 3659, 5775, 10977, 18295, 25613, 40249, 54885, 76839, 91475, 120747, 128065, 201245, 274425, 281743, 384195, 603735, 640325, 845229, 1006225, 1408715, 1920975, 3018675, 4226145, 7043575, 21130725]

約数ペア:

[(1, 21130725), (3, 7043575), (5, 4226145), (7, 3018675), (11, 1920975), (15, 1408715), (21, 1006225), (25, 845229), (33, 640325), (35, 603735), (55, 384195), (75, 281743), (77, 274425), (105, 201245), (165, 128065), (175, 120747), (231, 91475), (275, 76839), (385, 54885), (525, 40249), (825, 25613), (1155, 18295), (1925, 10977), (3659, 5775)]