21989745

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8573}}^1$

素因数の和:8606

約数の個数: 32

約数和(自身を含む): 41155200

約数和(自身を除く): 19165455

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8573, 25719, 42865, 77157, 128595, 162887, 231471, 385785, 488661, 814435, 1157355, 1465983, 2443305, 4397949, 7329915, 21989745]

約数ペア:

[(1, 21989745), (3, 7329915), (5, 4397949), (9, 2443305), (15, 1465983), (19, 1157355), (27, 814435), (45, 488661), (57, 385785), (95, 231471), (135, 162887), (171, 128595), (285, 77157), (513, 42865), (855, 25719), (2565, 8573)]