20955935

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 13880545

約数列:

[1, 5, 7, 11, 13, 35, 53, 55, 65, 77, 79, 91, 143, 265, 371, 385, 395, 455, 553, 583, 689, 715, 869, 1001, 1027, 1855, 2765, 2915, 3445, 4081, 4187, 4345, 4823, 5005, 5135, 6083, 7189, 7579, 11297, 20405, 20935, 24115, 29309, 30415, 35945, 37895, 46057, 53053, 54431, 56485, 79079, 146545, 230285, 265265, 272155, 322399, 381017, 395395, 598741, 1611995, 1905085, 2993705, 4191187, 20955935]

約数ペア:

[(1, 20955935), (5, 4191187), (7, 2993705), (11, 1905085), (13, 1611995), (35, 598741), (53, 395395), (55, 381017), (65, 322399), (77, 272155), (79, 265265), (91, 230285), (143, 146545), (265, 79079), (371, 56485), (385, 54431), (395, 53053), (455, 46057), (553, 37895), (583, 35945), (689, 30415), (715, 29309), (869, 24115), (1001, 20935), (1027, 20405), (1855, 11297), (2765, 7579), (2915, 7189), (3445, 6083), (4081, 5135), (4187, 5005), (4345, 4823)]