21333208

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{509}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 44798400

約数和(自身を除く): 23465192

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 169, 248, 338, 403, 509, 676, 806, 1018, 1352, 1612, 2036, 3224, 4072, 5239, 6617, 10478, 13234, 15779, 20956, 26468, 31558, 41912, 52936, 63116, 86021, 126232, 172042, 205127, 344084, 410254, 688168, 820508, 1641016, 2666651, 5333302, 10666604, 21333208]

約数ペア:

[(1, 21333208), (2, 10666604), (4, 5333302), (8, 2666651), (13, 1641016), (26, 820508), (31, 688168), (52, 410254), (62, 344084), (104, 205127), (124, 172042), (169, 126232), (248, 86021), (338, 63116), (403, 52936), (509, 41912), (676, 31558), (806, 26468), (1018, 20956), (1352, 15779), (1612, 13234), (2036, 10478), (3224, 6617), (4072, 5239)]