21638408

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:246

約数の個数: 64

約数和(自身を含む): 46872000

約数和(自身を除く): 25233592

約数列:

[1, 2, 4, 8, 11, 22, 29, 44, 58, 61, 88, 116, 122, 139, 232, 244, 278, 319, 488, 556, 638, 671, 1112, 1276, 1342, 1529, 1769, 2552, 2684, 3058, 3538, 4031, 5368, 6116, 7076, 8062, 8479, 12232, 14152, 16124, 16958, 19459, 32248, 33916, 38918, 44341, 67832, 77836, 88682, 93269, 155672, 177364, 186538, 245891, 354728, 373076, 491782, 746152, 983564, 1967128, 2704801, 5409602, 10819204, 21638408]

約数ペア:

[(1, 21638408), (2, 10819204), (4, 5409602), (8, 2704801), (11, 1967128), (22, 983564), (29, 746152), (44, 491782), (58, 373076), (61, 354728), (88, 245891), (116, 186538), (122, 177364), (139, 155672), (232, 93269), (244, 88682), (278, 77836), (319, 67832), (488, 44341), (556, 38918), (638, 33916), (671, 32248), (1112, 19459), (1276, 16958), (1342, 16124), (1529, 14152), (1769, 12232), (2552, 8479), (2684, 8062), (3058, 7076), (3538, 6116), (4031, 5368)]