20987008

素因数分解:

$2^7\times 7^1\times {\mathrm{59}}^1\times {\mathrm{397}}^1$

素因数の和:477

約数の個数: 64

約数和(自身を含む): 48715200

約数和(自身を除く): 27728192

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 59, 64, 112, 118, 128, 224, 236, 397, 413, 448, 472, 794, 826, 896, 944, 1588, 1652, 1888, 2779, 3176, 3304, 3776, 5558, 6352, 6608, 7552, 11116, 12704, 13216, 22232, 23423, 25408, 26432, 44464, 46846, 50816, 52864, 88928, 93692, 163961, 177856, 187384, 327922, 355712, 374768, 655844, 749536, 1311688, 1499072, 2623376, 2998144, 5246752, 10493504, 20987008]

約数ペア:

[(1, 20987008), (2, 10493504), (4, 5246752), (7, 2998144), (8, 2623376), (14, 1499072), (16, 1311688), (28, 749536), (32, 655844), (56, 374768), (59, 355712), (64, 327922), (112, 187384), (118, 177856), (128, 163961), (224, 93692), (236, 88928), (397, 52864), (413, 50816), (448, 46846), (472, 44464), (794, 26432), (826, 25408), (896, 23423), (944, 22232), (1588, 13216), (1652, 12704), (1888, 11116), (2779, 7552), (3176, 6608), (3304, 6352), (3776, 5558)]