21178749

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{569}}^1\times {\mathrm{653}}^1$

素因数の和:1244

約数の個数: 16

約数和(自身を含む): 29822400

約数和(自身を除く): 8643651

約数列:

[1, 3, 19, 57, 569, 653, 1707, 1959, 10811, 12407, 32433, 37221, 371557, 1114671, 7059583, 21178749]

約数ペア:

[(1, 21178749), (3, 7059583), (19, 1114671), (57, 371557), (569, 37221), (653, 32433), (1707, 12407), (1959, 10811)]