211231395

素因数分解:

$3^8\times 5^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 391120704

約数和(自身を除く): 179889309

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 137, 141, 235, 243, 405, 411, 423, 685, 705, 729, 1215, 1233, 1269, 2055, 2115, 2187, 3645, 3699, 3807, 6165, 6345, 6439, 6561, 10935, 11097, 11421, 18495, 19035, 19317, 32195, 32805, 33291, 34263, 55485, 57105, 57951, 96585, 99873, 102789, 166455, 171315, 173853, 289755, 299619, 308367, 499365, 513945, 521559, 869265, 898857, 1498095, 1541835, 1564677, 2607795, 4494285, 4694031, 7823385, 14082093, 23470155, 42246279, 70410465, 211231395]

約数ペア:

[(1, 211231395), (3, 70410465), (5, 42246279), (9, 23470155), (15, 14082093), (27, 7823385), (45, 4694031), (47, 4494285), (81, 2607795), (135, 1564677), (137, 1541835), (141, 1498095), (235, 898857), (243, 869265), (405, 521559), (411, 513945), (423, 499365), (685, 308367), (705, 299619), (729, 289755), (1215, 173853), (1233, 171315), (1269, 166455), (2055, 102789), (2115, 99873), (2187, 96585), (3645, 57951), (3699, 57105), (3807, 55485), (6165, 34263), (6345, 33291), (6439, 32805), (6561, 32195), (10935, 19317), (11097, 19035), (11421, 18495)]