21443128

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 48153600

約数和(自身を除く): 26710472

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 74, 79, 131, 148, 158, 259, 262, 296, 316, 518, 524, 553, 632, 917, 1036, 1048, 1106, 1834, 2072, 2212, 2923, 3668, 4424, 4847, 5846, 7336, 9694, 10349, 11692, 19388, 20461, 20698, 23384, 33929, 38776, 40922, 41396, 67858, 72443, 81844, 82792, 135716, 144886, 163688, 271432, 289772, 382913, 579544, 765826, 1531652, 2680391, 3063304, 5360782, 10721564, 21443128]

約数ペア:

[(1, 21443128), (2, 10721564), (4, 5360782), (7, 3063304), (8, 2680391), (14, 1531652), (28, 765826), (37, 579544), (56, 382913), (74, 289772), (79, 271432), (131, 163688), (148, 144886), (158, 135716), (259, 82792), (262, 81844), (296, 72443), (316, 67858), (518, 41396), (524, 40922), (553, 38776), (632, 33929), (917, 23384), (1036, 20698), (1048, 20461), (1106, 19388), (1834, 11692), (2072, 10349), (2212, 9694), (2923, 7336), (3668, 5846), (4424, 4847)]