21603320

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{1109}}^1$

素因数の和:1607

約数の個数: 32

約数和(自身を含む): 48751200

約数和(自身を除く): 27147880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1109, 1948, 2218, 2435, 3896, 4436, 4870, 5545, 8872, 9740, 11090, 19480, 22180, 44360, 540083, 1080166, 2160332, 2700415, 4320664, 5400830, 10801660, 21603320]

約数ペア:

[(1, 21603320), (2, 10801660), (4, 5400830), (5, 4320664), (8, 2700415), (10, 2160332), (20, 1080166), (40, 540083), (487, 44360), (974, 22180), (1109, 19480), (1948, 11090), (2218, 9740), (2435, 8872), (3896, 5545), (4436, 4870)]