21390358

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:348

約数の個数: 32

約数和(自身を含む): 36246528

約数和(自身を除く): 14856170

約数列:

[1, 2, 11, 22, 47, 94, 137, 151, 274, 302, 517, 1034, 1507, 1661, 3014, 3322, 6439, 7097, 12878, 14194, 20687, 41374, 70829, 78067, 141658, 156134, 227557, 455114, 972289, 1944578, 10695179, 21390358]

約数ペア:

[(1, 21390358), (2, 10695179), (11, 1944578), (22, 972289), (47, 455114), (94, 227557), (137, 156134), (151, 141658), (274, 78067), (302, 70829), (517, 41374), (1034, 20687), (1507, 14194), (1661, 12878), (3014, 7097), (3322, 6439)]