21156752

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{409}}^1$

素因数の和:531

約数の個数: 40

約数和(自身を含む): 42553080

約数和(自身を除く): 21396328

約数列:

[1, 2, 4, 8, 16, 53, 61, 106, 122, 212, 244, 409, 424, 488, 818, 848, 976, 1636, 3233, 3272, 6466, 6544, 12932, 21677, 24949, 25864, 43354, 49898, 51728, 86708, 99796, 173416, 199592, 346832, 399184, 1322297, 2644594, 5289188, 10578376, 21156752]

約数ペア:

[(1, 21156752), (2, 10578376), (4, 5289188), (8, 2644594), (16, 1322297), (53, 399184), (61, 346832), (106, 199592), (122, 173416), (212, 99796), (244, 86708), (409, 51728), (424, 49898), (488, 43354), (818, 25864), (848, 24949), (976, 21677), (1636, 12932), (3233, 6544), (3272, 6466)]