21178641

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{12109}}^1$

素因数の和:12176

約数の個数: 16

約数和(自身を含む): 31389120

約数和(自身を除く): 10210479

約数列:

[1, 3, 11, 33, 53, 159, 583, 1749, 12109, 36327, 133199, 399597, 641777, 1925331, 7059547, 21178641]

約数ペア:

[(1, 21178641), (3, 7059547), (11, 1925331), (33, 641777), (53, 399597), (159, 133199), (583, 36327), (1749, 12109)]