20497904

素因数分解:

$2^4\times 7^1\times {\mathrm{397}}^1\times {\mathrm{461}}^1$

素因数の和:873

約数の個数: 40

約数和(自身を含む): 45601248

約数和(自身を除く): 25103344

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 397, 461, 794, 922, 1588, 1844, 2779, 3176, 3227, 3688, 5558, 6352, 6454, 7376, 11116, 12908, 22232, 25816, 44464, 51632, 183017, 366034, 732068, 1281119, 1464136, 2562238, 2928272, 5124476, 10248952, 20497904]

約数ペア:

[(1, 20497904), (2, 10248952), (4, 5124476), (7, 2928272), (8, 2562238), (14, 1464136), (16, 1281119), (28, 732068), (56, 366034), (112, 183017), (397, 51632), (461, 44464), (794, 25816), (922, 22232), (1588, 12908), (1844, 11116), (2779, 7376), (3176, 6454), (3227, 6352), (3688, 5558)]