20618556

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{631}}^1$

素因数の和:1034

約数の個数: 48

約数和(自身を含む): 55211520

約数和(自身を除く): 34592964

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 389, 631, 778, 1167, 1262, 1556, 1893, 2334, 2524, 2723, 3786, 4417, 4668, 5446, 7572, 8169, 8834, 10892, 13251, 16338, 17668, 26502, 32676, 53004, 245459, 490918, 736377, 981836, 1472754, 1718213, 2945508, 3436426, 5154639, 6872852, 10309278, 20618556]

約数ペア:

[(1, 20618556), (2, 10309278), (3, 6872852), (4, 5154639), (6, 3436426), (7, 2945508), (12, 1718213), (14, 1472754), (21, 981836), (28, 736377), (42, 490918), (84, 245459), (389, 53004), (631, 32676), (778, 26502), (1167, 17668), (1262, 16338), (1556, 13251), (1893, 10892), (2334, 8834), (2524, 8169), (2723, 7572), (3786, 5446), (4417, 4668)]