21643492

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{101}}^1\times {\mathrm{317}}^1$

素因数の和:448

約数の個数: 36

約数和(自身を含む): 41550516

約数和(自身を除く): 19907024

約数列:

[1, 2, 4, 13, 26, 52, 101, 169, 202, 317, 338, 404, 634, 676, 1268, 1313, 2626, 4121, 5252, 8242, 16484, 17069, 32017, 34138, 53573, 64034, 68276, 107146, 128068, 214292, 416221, 832442, 1664884, 5410873, 10821746, 21643492]

約数ペア:

[(1, 21643492), (2, 10821746), (4, 5410873), (13, 1664884), (26, 832442), (52, 416221), (101, 214292), (169, 128068), (202, 107146), (317, 68276), (338, 64034), (404, 53573), (634, 34138), (676, 32017), (1268, 17069), (1313, 16484), (2626, 8242), (4121, 5252)]