20215575

素因数分解:

$3^4\times 5^2\times {\mathrm{67}}^1\times {\mathrm{149}}^1$

素因数の和:238

約数の個数: 60

約数和(自身を含む): 38260200

約数和(自身を除く): 18044625

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 67, 75, 81, 135, 149, 201, 225, 335, 405, 447, 603, 675, 745, 1005, 1341, 1675, 1809, 2025, 2235, 3015, 3725, 4023, 5025, 5427, 6705, 9045, 9983, 11175, 12069, 15075, 20115, 27135, 29949, 33525, 45225, 49915, 60345, 89847, 100575, 135675, 149745, 249575, 269541, 301725, 449235, 748725, 808623, 1347705, 2246175, 4043115, 6738525, 20215575]

約数ペア:

[(1, 20215575), (3, 6738525), (5, 4043115), (9, 2246175), (15, 1347705), (25, 808623), (27, 748725), (45, 449235), (67, 301725), (75, 269541), (81, 249575), (135, 149745), (149, 135675), (201, 100575), (225, 89847), (335, 60345), (405, 49915), (447, 45225), (603, 33525), (675, 29949), (745, 27135), (1005, 20115), (1341, 15075), (1675, 12069), (1809, 11175), (2025, 9983), (2235, 9045), (3015, 6705), (3725, 5427), (4023, 5025)]