21816015

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6581}}^1$

素因数の和:6619

約数の個数: 32

約数和(自身を含む): 39807936

約数和(自身を除く): 17991921

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6581, 19743, 32905, 85553, 98715, 111877, 256659, 335631, 427765, 559385, 1283295, 1454401, 1678155, 4363203, 7272005, 21816015]

約数ペア:

[(1, 21816015), (3, 7272005), (5, 4363203), (13, 1678155), (15, 1454401), (17, 1283295), (39, 559385), (51, 427765), (65, 335631), (85, 256659), (195, 111877), (221, 98715), (255, 85553), (663, 32905), (1105, 19743), (3315, 6581)]