21778216

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{991}}^1$

素因数の和:1105

約数の個数: 32

約数和(自身を含む): 42497280

約数和(自身を除く): 20719064

約数列:

[1, 2, 4, 8, 41, 67, 82, 134, 164, 268, 328, 536, 991, 1982, 2747, 3964, 5494, 7928, 10988, 21976, 40631, 66397, 81262, 132794, 162524, 265588, 325048, 531176, 2722277, 5444554, 10889108, 21778216]

約数ペア:

[(1, 21778216), (2, 10889108), (4, 5444554), (8, 2722277), (41, 531176), (67, 325048), (82, 265588), (134, 162524), (164, 132794), (268, 81262), (328, 66397), (536, 40631), (991, 21976), (1982, 10988), (2747, 7928), (3964, 5494)]