19983920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22709}}^1$

素因数の和:22733

約数の個数: 40

約数和(自身を含む): 50688720

約数和(自身を除く): 30704800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22709, 45418, 90836, 113545, 181672, 227090, 249799, 363344, 454180, 499598, 908360, 999196, 1248995, 1816720, 1998392, 2497990, 3996784, 4995980, 9991960, 19983920]

約数ペア:

[(1, 19983920), (2, 9991960), (4, 4995980), (5, 3996784), (8, 2497990), (10, 1998392), (11, 1816720), (16, 1248995), (20, 999196), (22, 908360), (40, 499598), (44, 454180), (55, 363344), (80, 249799), (88, 227090), (110, 181672), (176, 113545), (220, 90836), (440, 45418), (880, 22709)]