28708225

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{12619}}^1$

素因数の和:12649

約数の個数: 24

約数和(自身を含む): 43816640

約数和(自身を除く): 15108415

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 12619, 63095, 88333, 164047, 315475, 441665, 820235, 1148329, 2208325, 4101175, 5741645, 28708225]

約数ペア:

[(1, 28708225), (5, 5741645), (7, 4101175), (13, 2208325), (25, 1148329), (35, 820235), (65, 441665), (91, 315475), (175, 164047), (325, 88333), (455, 63095), (2275, 12619)]