21209786

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{4271}}^1$

素因数の和:4477

約数の個数: 16

約数和(自身を含む): 34449408

約数和(自身を除く): 13239622

約数列:

[1, 2, 13, 26, 191, 382, 2483, 4271, 4966, 8542, 55523, 111046, 815761, 1631522, 10604893, 21209786]

約数ペア:

[(1, 21209786), (2, 10604893), (13, 1631522), (26, 815761), (191, 111046), (382, 55523), (2483, 8542), (4271, 4966)]