20943405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3911}}^1$

素因数の和:3946

約数の個数: 48

約数和(自身を含む): 43939584

約数和(自身を除く): 22996179

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3911, 5355, 11733, 19555, 27377, 35199, 58665, 66487, 82131, 136885, 175995, 199461, 246393, 332435, 410655, 465409, 598383, 997305, 1231965, 1396227, 2327045, 2991915, 4188681, 6981135, 20943405]

約数ペア:

[(1, 20943405), (3, 6981135), (5, 4188681), (7, 2991915), (9, 2327045), (15, 1396227), (17, 1231965), (21, 997305), (35, 598383), (45, 465409), (51, 410655), (63, 332435), (85, 246393), (105, 199461), (119, 175995), (153, 136885), (255, 82131), (315, 66487), (357, 58665), (595, 35199), (765, 27377), (1071, 19555), (1785, 11733), (3911, 5355)]