21708609

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 11676351

約数列:

[1, 3, 13, 17, 39, 51, 137, 221, 239, 411, 663, 717, 1781, 2329, 3107, 4063, 5343, 6987, 9321, 12189, 30277, 32743, 52819, 90831, 98229, 158457, 425659, 556631, 1276977, 1669893, 7236203, 21708609]

約数ペア:

[(1, 21708609), (3, 7236203), (13, 1669893), (17, 1276977), (39, 556631), (51, 425659), (137, 158457), (221, 98229), (239, 90831), (411, 52819), (663, 32743), (717, 30277), (1781, 12189), (2329, 9321), (3107, 6987), (4063, 5343)]