21781396

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{4603}}^1$

素因数の和:4640

約数の個数: 36

約数和(自身を含む): 47181792

約数和(自身を除く): 25400396

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 169, 182, 338, 364, 676, 1183, 2366, 4603, 4732, 9206, 18412, 32221, 59839, 64442, 119678, 128884, 239356, 418873, 777907, 837746, 1555814, 1675492, 3111628, 5445349, 10890698, 21781396]

約数ペア:

[(1, 21781396), (2, 10890698), (4, 5445349), (7, 3111628), (13, 1675492), (14, 1555814), (26, 837746), (28, 777907), (52, 418873), (91, 239356), (169, 128884), (182, 119678), (338, 64442), (364, 59839), (676, 32221), (1183, 18412), (2366, 9206), (4603, 4732)]