21000279753

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{509}}^1\times {\mathrm{4673}}^1$

素因数の和:5303

約数の個数: 40

約数和(自身を含む): 31727579400

約数和(自身を除く): 10727299647

約数列:

[1, 3, 9, 27, 81, 109, 327, 509, 981, 1527, 2943, 4581, 4673, 8829, 13743, 14019, 41229, 42057, 55481, 126171, 166443, 378513, 499329, 509357, 1497987, 1528071, 2378557, 4493961, 4584213, 7135671, 13752639, 21407013, 41257917, 64221039, 192663117, 259262713, 777788139, 2333364417, 7000093251, 21000279753]

約数ペア:

[(1, 21000279753), (3, 7000093251), (9, 2333364417), (27, 777788139), (81, 259262713), (109, 192663117), (327, 64221039), (509, 41257917), (981, 21407013), (1527, 13752639), (2943, 7135671), (4581, 4584213), (4673, 4493961), (8829, 2378557), (13743, 1528071), (14019, 1497987), (41229, 509357), (42057, 499329), (55481, 378513), (126171, 166443)]