21308025

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^2\times {\mathrm{787}}^1$

素因数の和:838

約数の個数: 36

約数和(自身を含む): 37228272

約数和(自身を除く): 15920247

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 361, 475, 787, 1083, 1425, 1805, 2361, 3935, 5415, 9025, 11805, 14953, 19675, 27075, 44859, 59025, 74765, 224295, 284107, 373825, 852321, 1121475, 1420535, 4261605, 7102675, 21308025]

約数ペア:

[(1, 21308025), (3, 7102675), (5, 4261605), (15, 1420535), (19, 1121475), (25, 852321), (57, 373825), (75, 284107), (95, 224295), (285, 74765), (361, 59025), (475, 44859), (787, 27075), (1083, 19675), (1425, 14953), (1805, 11805), (2361, 9025), (3935, 5415)]