20789968660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1\times {\mathrm{89821}}^1$

素因数の和:90064

約数の個数: 48

約数和(自身を含む): 44545963392

約数和(自身を除く): 23755994732

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 163, 284, 326, 355, 652, 710, 815, 1420, 1630, 3260, 11573, 23146, 46292, 57865, 89821, 115730, 179642, 231460, 359284, 449105, 898210, 1796420, 6377291, 12754582, 14640823, 25509164, 29281646, 31886455, 58563292, 63772910, 73204115, 127545820, 146408230, 292816460, 1039498433, 2078996866, 4157993732, 5197492165, 10394984330, 20789968660]

約数ペア:

[(1, 20789968660), (2, 10394984330), (4, 5197492165), (5, 4157993732), (10, 2078996866), (20, 1039498433), (71, 292816460), (142, 146408230), (163, 127545820), (284, 73204115), (326, 63772910), (355, 58563292), (652, 31886455), (710, 29281646), (815, 25509164), (1420, 14640823), (1630, 12754582), (3260, 6377291), (11573, 1796420), (23146, 898210), (46292, 449105), (57865, 359284), (89821, 231460), (115730, 179642)]