19109720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{491}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 30483880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 491, 556, 695, 973, 982, 1112, 1390, 1946, 1964, 2455, 2780, 3437, 3892, 3928, 4865, 4910, 5560, 6874, 7784, 9730, 9820, 13748, 17185, 19460, 19640, 27496, 34370, 38920, 68249, 68740, 136498, 137480, 272996, 341245, 477743, 545992, 682490, 955486, 1364980, 1910972, 2388715, 2729960, 3821944, 4777430, 9554860, 19109720]

約数ペア:

[(1, 19109720), (2, 9554860), (4, 4777430), (5, 3821944), (7, 2729960), (8, 2388715), (10, 1910972), (14, 1364980), (20, 955486), (28, 682490), (35, 545992), (40, 477743), (56, 341245), (70, 272996), (139, 137480), (140, 136498), (278, 68740), (280, 68249), (491, 38920), (556, 34370), (695, 27496), (973, 19640), (982, 19460), (1112, 17185), (1390, 13748), (1946, 9820), (1964, 9730), (2455, 7784), (2780, 6874), (3437, 5560), (3892, 4910), (3928, 4865)]