21791848

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{661}}^1$

素因数の和:997

約数の個数: 32

約数和(自身を含む): 44208360

約数和(自身を除く): 22416512

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 317, 634, 661, 1268, 1322, 2536, 2644, 4121, 5288, 8242, 8593, 16484, 17186, 32968, 34372, 68744, 209537, 419074, 838148, 1676296, 2723981, 5447962, 10895924, 21791848]

約数ペア:

[(1, 21791848), (2, 10895924), (4, 5447962), (8, 2723981), (13, 1676296), (26, 838148), (52, 419074), (104, 209537), (317, 68744), (634, 34372), (661, 32968), (1268, 17186), (1322, 16484), (2536, 8593), (2644, 8242), (4121, 5288)]