21128552

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{337}}^1\times {\mathrm{461}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 42162120

約数和(自身を除く): 21033568

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 337, 461, 674, 922, 1348, 1844, 2696, 3688, 5729, 7837, 11458, 15674, 22916, 31348, 45832, 62696, 155357, 310714, 621428, 1242856, 2641069, 5282138, 10564276, 21128552]

約数ペア:

[(1, 21128552), (2, 10564276), (4, 5282138), (8, 2641069), (17, 1242856), (34, 621428), (68, 310714), (136, 155357), (337, 62696), (461, 45832), (674, 31348), (922, 22916), (1348, 15674), (1844, 11458), (2696, 7837), (3688, 5729)]