21254236

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:442

約数の個数: 36

約数和(自身を含む): 40325040

約数和(自身を除く): 19070804

約数列:

[1, 2, 4, 19, 38, 41, 76, 82, 164, 359, 361, 718, 722, 779, 1436, 1444, 1558, 3116, 6821, 13642, 14719, 14801, 27284, 29438, 29602, 58876, 59204, 129599, 259198, 279661, 518396, 559322, 1118644, 5313559, 10627118, 21254236]

約数ペア:

[(1, 21254236), (2, 10627118), (4, 5313559), (19, 1118644), (38, 559322), (41, 518396), (76, 279661), (82, 259198), (164, 129599), (359, 59204), (361, 58876), (718, 29602), (722, 29438), (779, 27284), (1436, 14801), (1444, 14719), (1558, 13642), (3116, 6821)]