21970377

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 38246208

約数和(自身を除く): 16275831

約数列:

[1, 3, 9, 11, 13, 33, 39, 43, 99, 117, 129, 143, 387, 397, 429, 473, 559, 1191, 1287, 1419, 1677, 3573, 4257, 4367, 5031, 5161, 6149, 13101, 15483, 17071, 18447, 39303, 46449, 51213, 55341, 56771, 153639, 170313, 187781, 221923, 510939, 563343, 665769, 1690029, 1997307, 2441153, 7323459, 21970377]

約数ペア:

[(1, 21970377), (3, 7323459), (9, 2441153), (11, 1997307), (13, 1690029), (33, 665769), (39, 563343), (43, 510939), (99, 221923), (117, 187781), (129, 170313), (143, 153639), (387, 56771), (397, 55341), (429, 51213), (473, 46449), (559, 39303), (1191, 18447), (1287, 17071), (1419, 15483), (1677, 13101), (3573, 6149), (4257, 5161), (4367, 5031)]