21307412

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 44381568

約数和(自身を除く): 23074156

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 131, 148, 157, 259, 262, 314, 518, 524, 628, 917, 1036, 1099, 1834, 2198, 3668, 4396, 4847, 5809, 9694, 11618, 19388, 20567, 23236, 33929, 40663, 41134, 67858, 81326, 82268, 135716, 143969, 162652, 287938, 575876, 760979, 1521958, 3043916, 5326853, 10653706, 21307412]

約数ペア:

[(1, 21307412), (2, 10653706), (4, 5326853), (7, 3043916), (14, 1521958), (28, 760979), (37, 575876), (74, 287938), (131, 162652), (148, 143969), (157, 135716), (259, 82268), (262, 81326), (314, 67858), (518, 41134), (524, 40663), (628, 33929), (917, 23236), (1036, 20567), (1099, 19388), (1834, 11618), (2198, 9694), (3668, 5809), (4396, 4847)]