20881712

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{76771}}^1$

素因数の和:76796

約数の個数: 20

約数和(自身を含む): 42838776

約数和(自身を除く): 21957064

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 76771, 153542, 307084, 614168, 1228336, 1305107, 2610214, 5220428, 10440856, 20881712]

約数ペア:

[(1, 20881712), (2, 10440856), (4, 5220428), (8, 2610214), (16, 1305107), (17, 1228336), (34, 614168), (68, 307084), (136, 153542), (272, 76771)]