20943825

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 41559840

約数和(自身を除く): 20616015

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 41, 49, 75, 105, 123, 139, 147, 175, 205, 245, 287, 417, 525, 615, 695, 735, 861, 973, 1025, 1225, 1435, 2009, 2085, 2919, 3075, 3475, 3675, 4305, 4865, 5699, 6027, 6811, 7175, 10045, 10425, 14595, 17097, 20433, 21525, 24325, 28495, 30135, 34055, 39893, 50225, 72975, 85485, 102165, 119679, 142475, 150675, 170275, 199465, 279251, 427425, 510825, 598395, 837753, 997325, 1396255, 2991975, 4188765, 6981275, 20943825]

約数ペア:

[(1, 20943825), (3, 6981275), (5, 4188765), (7, 2991975), (15, 1396255), (21, 997325), (25, 837753), (35, 598395), (41, 510825), (49, 427425), (75, 279251), (105, 199465), (123, 170275), (139, 150675), (147, 142475), (175, 119679), (205, 102165), (245, 85485), (287, 72975), (417, 50225), (525, 39893), (615, 34055), (695, 30135), (735, 28495), (861, 24325), (973, 21525), (1025, 20433), (1225, 17097), (1435, 14595), (2009, 10425), (2085, 10045), (2919, 7175), (3075, 6811), (3475, 6027), (3675, 5699), (4305, 4865)]