20316880

素因数分解:

$2^4\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1109}}^1$

素因数の和:1351

約数の個数: 40

約数和(自身を含む): 47485800

約数和(自身を除く): 27168920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 229, 458, 916, 1109, 1145, 1832, 2218, 2290, 3664, 4436, 4580, 5545, 8872, 9160, 11090, 17744, 18320, 22180, 44360, 88720, 253961, 507922, 1015844, 1269805, 2031688, 2539610, 4063376, 5079220, 10158440, 20316880]

約数ペア:

[(1, 20316880), (2, 10158440), (4, 5079220), (5, 4063376), (8, 2539610), (10, 2031688), (16, 1269805), (20, 1015844), (40, 507922), (80, 253961), (229, 88720), (458, 44360), (916, 22180), (1109, 18320), (1145, 17744), (1832, 11090), (2218, 9160), (2290, 8872), (3664, 5545), (4436, 4580)]