9009980

素因数分解:

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

素因数の和:618

約数の個数: 48

約数和(自身を含む): 21826560

約数和(自身を除く): 12816580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 463, 556, 695, 926, 973, 1390, 1852, 1946, 2315, 2780, 3241, 3892, 4630, 4865, 6482, 9260, 9730, 12964, 16205, 19460, 32410, 64357, 64820, 128714, 257428, 321785, 450499, 643570, 900998, 1287140, 1801996, 2252495, 4504990, 9009980]

約数ペア:

[(1, 9009980), (2, 4504990), (4, 2252495), (5, 1801996), (7, 1287140), (10, 900998), (14, 643570), (20, 450499), (28, 321785), (35, 257428), (70, 128714), (139, 64820), (140, 64357), (278, 32410), (463, 19460), (556, 16205), (695, 12964), (926, 9730), (973, 9260), (1390, 6482), (1852, 4865), (1946, 4630), (2315, 3892), (2780, 3241)]