21680425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3511}}^1$

素因数の和:3553

約数の個数: 24

約数和(自身を含む): 30484160

約数和(自身を除く): 8803735

約数列:

[1, 5, 13, 19, 25, 65, 95, 247, 325, 475, 1235, 3511, 6175, 17555, 45643, 66709, 87775, 228215, 333545, 867217, 1141075, 1667725, 4336085, 21680425]

約数ペア:

[(1, 21680425), (5, 4336085), (13, 1667725), (19, 1141075), (25, 867217), (65, 333545), (95, 228215), (247, 87775), (325, 66709), (475, 45643), (1235, 17555), (3511, 6175)]