278318187

素因数分解:

$3^4\times 7^2\times {\mathrm{70123}}^1$

素因数の和:70149

約数の個数: 30

約数和(自身を含む): 483645228

約数和(自身を除く): 205327041

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 70123, 210369, 490861, 631107, 1472583, 1893321, 3436027, 4417749, 5679963, 10308081, 13253247, 30924243, 39759741, 92772729, 278318187]

約数ペア:

[(1, 278318187), (3, 92772729), (7, 39759741), (9, 30924243), (21, 13253247), (27, 10308081), (49, 5679963), (63, 4417749), (81, 3436027), (147, 1893321), (189, 1472583), (441, 631107), (567, 490861), (1323, 210369), (3969, 70123)]