21980816

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{739}}^1$

素因数の和:784

約数の個数: 60

約数和(自身を含む): 50376240

約数和(自身を除く): 28395424

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 88, 104, 143, 169, 176, 208, 286, 338, 572, 676, 739, 1144, 1352, 1478, 1859, 2288, 2704, 2956, 3718, 5912, 7436, 8129, 9607, 11824, 14872, 16258, 19214, 29744, 32516, 38428, 65032, 76856, 105677, 124891, 130064, 153712, 211354, 249782, 422708, 499564, 845416, 999128, 1373801, 1690832, 1998256, 2747602, 5495204, 10990408, 21980816]

約数ペア:

[(1, 21980816), (2, 10990408), (4, 5495204), (8, 2747602), (11, 1998256), (13, 1690832), (16, 1373801), (22, 999128), (26, 845416), (44, 499564), (52, 422708), (88, 249782), (104, 211354), (143, 153712), (169, 130064), (176, 124891), (208, 105677), (286, 76856), (338, 65032), (572, 38428), (676, 32516), (739, 29744), (1144, 19214), (1352, 16258), (1478, 14872), (1859, 11824), (2288, 9607), (2704, 8129), (2956, 7436), (3718, 5912)]