21778731

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 36385440

約数和(自身を除く): 14606709

約数列:

[1, 3, 9, 13, 19, 39, 57, 97, 101, 117, 171, 247, 291, 303, 741, 873, 909, 1261, 1313, 1843, 1919, 2223, 3783, 3939, 5529, 5757, 9797, 11349, 11817, 16587, 17271, 23959, 24947, 29391, 71877, 74841, 88173, 127361, 186143, 215631, 224523, 382083, 558429, 1146249, 1675287, 2419859, 7259577, 21778731]

約数ペア:

[(1, 21778731), (3, 7259577), (9, 2419859), (13, 1675287), (19, 1146249), (39, 558429), (57, 382083), (97, 224523), (101, 215631), (117, 186143), (171, 127361), (247, 88173), (291, 74841), (303, 71877), (741, 29391), (873, 24947), (909, 23959), (1261, 17271), (1313, 16587), (1843, 11817), (1919, 11349), (2223, 9797), (3783, 5757), (3939, 5529)]