21876239

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{787}}^1$

素因数の和:843

約数の個数: 24

約数和(自身を含む): 28821888

約数和(自身を除く): 6945649

約数列:

[1, 7, 11, 19, 77, 133, 209, 361, 787, 1463, 2527, 3971, 5509, 8657, 14953, 27797, 60599, 104671, 164483, 284107, 1151381, 1988749, 3125177, 21876239]

約数ペア:

[(1, 21876239), (7, 3125177), (11, 1988749), (19, 1151381), (77, 284107), (133, 164483), (209, 104671), (361, 60599), (787, 27797), (1463, 14953), (2527, 8657), (3971, 5509)]