21039824

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 60

約数和(自身を含む): 45747072

約数和(自身を除く): 24707248

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 169, 208, 248, 251, 338, 403, 496, 502, 676, 806, 1004, 1352, 1612, 2008, 2704, 3224, 3263, 4016, 5239, 6448, 6526, 7781, 10478, 13052, 15562, 20956, 26104, 31124, 41912, 42419, 52208, 62248, 83824, 84838, 101153, 124496, 169676, 202306, 339352, 404612, 678704, 809224, 1314989, 1618448, 2629978, 5259956, 10519912, 21039824]

約数ペア:

[(1, 21039824), (2, 10519912), (4, 5259956), (8, 2629978), (13, 1618448), (16, 1314989), (26, 809224), (31, 678704), (52, 404612), (62, 339352), (104, 202306), (124, 169676), (169, 124496), (208, 101153), (248, 84838), (251, 83824), (338, 62248), (403, 52208), (496, 42419), (502, 41912), (676, 31124), (806, 26104), (1004, 20956), (1352, 15562), (1612, 13052), (2008, 10478), (2704, 7781), (3224, 6526), (3263, 6448), (4016, 5239)]