18019960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{463}}^1$

素因数の和:620

約数の個数: 64

約数和(自身を含む): 46771200

約数和(自身を除く): 28751240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 463, 556, 695, 926, 973, 1112, 1390, 1852, 1946, 2315, 2780, 3241, 3704, 3892, 4630, 4865, 5560, 6482, 7784, 9260, 9730, 12964, 16205, 18520, 19460, 25928, 32410, 38920, 64357, 64820, 128714, 129640, 257428, 321785, 450499, 514856, 643570, 900998, 1287140, 1801996, 2252495, 2574280, 3603992, 4504990, 9009980, 18019960]

約数ペア:

[(1, 18019960), (2, 9009980), (4, 4504990), (5, 3603992), (7, 2574280), (8, 2252495), (10, 1801996), (14, 1287140), (20, 900998), (28, 643570), (35, 514856), (40, 450499), (56, 321785), (70, 257428), (139, 129640), (140, 128714), (278, 64820), (280, 64357), (463, 38920), (556, 32410), (695, 25928), (926, 19460), (973, 18520), (1112, 16205), (1390, 12964), (1852, 9730), (1946, 9260), (2315, 7784), (2780, 6482), (3241, 5560), (3704, 4865), (3892, 4630)]