21490809

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{5279}}^1$

素因数の和:5364

約数の個数: 16

約数和(自身を含む): 30412800

約数和(自身を除く): 8921991

約数列:

[1, 3, 23, 59, 69, 177, 1357, 4071, 5279, 15837, 121417, 311461, 364251, 934383, 7163603, 21490809]

約数ペア:

[(1, 21490809), (3, 7163603), (23, 934383), (59, 364251), (69, 311461), (177, 121417), (1357, 15837), (4071, 5279)]