18954040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{487}}^1$

素因数の和:644

約数の個数: 64

約数和(自身を含む): 49190400

約数和(自身を除く): 30236360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 487, 556, 695, 973, 974, 1112, 1390, 1946, 1948, 2435, 2780, 3409, 3892, 3896, 4865, 4870, 5560, 6818, 7784, 9730, 9740, 13636, 17045, 19460, 19480, 27272, 34090, 38920, 67693, 68180, 135386, 136360, 270772, 338465, 473851, 541544, 676930, 947702, 1353860, 1895404, 2369255, 2707720, 3790808, 4738510, 9477020, 18954040]

約数ペア:

[(1, 18954040), (2, 9477020), (4, 4738510), (5, 3790808), (7, 2707720), (8, 2369255), (10, 1895404), (14, 1353860), (20, 947702), (28, 676930), (35, 541544), (40, 473851), (56, 338465), (70, 270772), (139, 136360), (140, 135386), (278, 68180), (280, 67693), (487, 38920), (556, 34090), (695, 27272), (973, 19480), (974, 19460), (1112, 17045), (1390, 13636), (1946, 9740), (1948, 9730), (2435, 7784), (2780, 6818), (3409, 5560), (3892, 4870), (3896, 4865)]