21231645

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17475555

約数列:

[1, 3, 5, 15, 19, 23, 41, 57, 69, 79, 95, 115, 123, 205, 237, 285, 345, 395, 437, 615, 779, 943, 1185, 1311, 1501, 1817, 2185, 2337, 2829, 3239, 3895, 4503, 4715, 5451, 6555, 7505, 9085, 9717, 11685, 14145, 16195, 17917, 22515, 27255, 34523, 48585, 53751, 61541, 74497, 89585, 103569, 172615, 184623, 223491, 268755, 307705, 372485, 517845, 923115, 1117455, 1415443, 4246329, 7077215, 21231645]

約数ペア:

[(1, 21231645), (3, 7077215), (5, 4246329), (15, 1415443), (19, 1117455), (23, 923115), (41, 517845), (57, 372485), (69, 307705), (79, 268755), (95, 223491), (115, 184623), (123, 172615), (205, 103569), (237, 89585), (285, 74497), (345, 61541), (395, 53751), (437, 48585), (615, 34523), (779, 27255), (943, 22515), (1185, 17917), (1311, 16195), (1501, 14145), (1817, 11685), (2185, 9717), (2337, 9085), (2829, 7505), (3239, 6555), (3895, 5451), (4503, 4715)]