19894977

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:275

約数の個数: 40

約数和(自身を含む): 31711680

約数和(自身を除く): 11816703

約数列:

[1, 3, 9, 23, 27, 59, 69, 81, 177, 181, 207, 531, 543, 621, 1357, 1593, 1629, 1863, 4071, 4163, 4779, 4887, 10679, 12213, 12489, 14661, 32037, 36639, 37467, 96111, 109917, 112401, 245617, 288333, 337203, 736851, 864999, 2210553, 6631659, 19894977]

約数ペア:

[(1, 19894977), (3, 6631659), (9, 2210553), (23, 864999), (27, 736851), (59, 337203), (69, 288333), (81, 245617), (177, 112401), (181, 109917), (207, 96111), (531, 37467), (543, 36639), (621, 32037), (1357, 14661), (1593, 12489), (1629, 12213), (1863, 10679), (4071, 4887), (4163, 4779)]