21012575

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1427}}^1$

素因数の和:1487

約数の個数: 24

約数和(自身を含む): 28331520

約数和(自身を除く): 7318945

約数列:

[1, 5, 19, 25, 31, 95, 155, 475, 589, 775, 1427, 2945, 7135, 14725, 27113, 35675, 44237, 135565, 221185, 677825, 840503, 1105925, 4202515, 21012575]

約数ペア:

[(1, 21012575), (5, 4202515), (19, 1105925), (25, 840503), (31, 677825), (95, 221185), (155, 135565), (475, 44237), (589, 35675), (775, 27113), (1427, 14725), (2945, 7135)]