19809680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22511}}^1$

素因数の和:22535

約数の個数: 40

約数和(自身を含む): 50246784

約数和(自身を除く): 30437104

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22511, 45022, 90044, 112555, 180088, 225110, 247621, 360176, 450220, 495242, 900440, 990484, 1238105, 1800880, 1980968, 2476210, 3961936, 4952420, 9904840, 19809680]

約数ペア:

[(1, 19809680), (2, 9904840), (4, 4952420), (5, 3961936), (8, 2476210), (10, 1980968), (11, 1800880), (16, 1238105), (20, 990484), (22, 900440), (40, 495242), (44, 450220), (55, 360176), (80, 247621), (88, 225110), (110, 180088), (176, 112555), (220, 90044), (440, 45022), (880, 22511)]