21800272

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{643}}^1$

素因数の和:827

約数の個数: 40

約数和(自身を含む): 45837344

約数和(自身を除く): 24037072

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 163, 208, 326, 643, 652, 1286, 1304, 2119, 2572, 2608, 4238, 5144, 8359, 8476, 10288, 16718, 16952, 33436, 33904, 66872, 104809, 133744, 209618, 419236, 838472, 1362517, 1676944, 2725034, 5450068, 10900136, 21800272]

約数ペア:

[(1, 21800272), (2, 10900136), (4, 5450068), (8, 2725034), (13, 1676944), (16, 1362517), (26, 838472), (52, 419236), (104, 209618), (163, 133744), (208, 104809), (326, 66872), (643, 33904), (652, 33436), (1286, 16952), (1304, 16718), (2119, 10288), (2572, 8476), (2608, 8359), (4238, 5144)]