21315138

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{273271}}^1$

素因数の和:273289

約数の個数: 16

約数和(自身を含む): 45909696

約数和(自身を除く): 24594558

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 273271, 546542, 819813, 1639626, 3552523, 7105046, 10657569, 21315138]

約数ペア:

[(1, 21315138), (2, 10657569), (3, 7105046), (6, 3552523), (13, 1639626), (26, 819813), (39, 546542), (78, 273271)]