19906480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22621}}^1$

素因数の和:22645

約数の個数: 40

約数和(自身を含む): 50492304

約数和(自身を除く): 30585824

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22621, 45242, 90484, 113105, 180968, 226210, 248831, 361936, 452420, 497662, 904840, 995324, 1244155, 1809680, 1990648, 2488310, 3981296, 4976620, 9953240, 19906480]

約数ペア:

[(1, 19906480), (2, 9953240), (4, 4976620), (5, 3981296), (8, 2488310), (10, 1990648), (11, 1809680), (16, 1244155), (20, 995324), (22, 904840), (40, 497662), (44, 452420), (55, 361936), (80, 248831), (88, 226210), (110, 180968), (176, 113105), (220, 90484), (440, 45242), (880, 22621)]