20718236

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{491}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 45626112

約数和(自身を除く): 24907876

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 137, 154, 274, 308, 491, 548, 959, 982, 1507, 1918, 1964, 3014, 3437, 3836, 5401, 6028, 6874, 10549, 10802, 13748, 21098, 21604, 37807, 42196, 67267, 75614, 134534, 151228, 269068, 470869, 739937, 941738, 1479874, 1883476, 2959748, 5179559, 10359118, 20718236]

約数ペア:

[(1, 20718236), (2, 10359118), (4, 5179559), (7, 2959748), (11, 1883476), (14, 1479874), (22, 941738), (28, 739937), (44, 470869), (77, 269068), (137, 151228), (154, 134534), (274, 75614), (308, 67267), (491, 42196), (548, 37807), (959, 21604), (982, 21098), (1507, 13748), (1918, 10802), (1964, 10549), (3014, 6874), (3437, 6028), (3836, 5401)]