19405960

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{9901}}^1$

素因数の和:9926

約数の個数: 48

約数和(自身を含む): 50797260

約数和(自身を除く): 31391300

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 9901, 19802, 39604, 49505, 69307, 79208, 99010, 138614, 198020, 277228, 346535, 396040, 485149, 554456, 693070, 970298, 1386140, 1940596, 2425745, 2772280, 3881192, 4851490, 9702980, 19405960]

約数ペア:

[(1, 19405960), (2, 9702980), (4, 4851490), (5, 3881192), (7, 2772280), (8, 2425745), (10, 1940596), (14, 1386140), (20, 970298), (28, 693070), (35, 554456), (40, 485149), (49, 396040), (56, 346535), (70, 277228), (98, 198020), (140, 138614), (196, 99010), (245, 79208), (280, 69307), (392, 49505), (490, 39604), (980, 19802), (1960, 9901)]