28780455

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 51442272

約数和(自身を除く): 22661817

約数列:

[1, 3, 5, 11, 15, 33, 55, 101, 121, 157, 165, 303, 363, 471, 505, 605, 785, 1111, 1515, 1727, 1815, 2355, 3333, 5181, 5555, 8635, 12221, 15857, 16665, 18997, 25905, 36663, 47571, 56991, 61105, 79285, 94985, 174427, 183315, 237855, 284955, 523281, 872135, 1918697, 2616405, 5756091, 9593485, 28780455]

約数ペア:

[(1, 28780455), (3, 9593485), (5, 5756091), (11, 2616405), (15, 1918697), (33, 872135), (55, 523281), (101, 284955), (121, 237855), (157, 183315), (165, 174427), (303, 94985), (363, 79285), (471, 61105), (505, 56991), (605, 47571), (785, 36663), (1111, 25905), (1515, 18997), (1727, 16665), (1815, 15857), (2355, 12221), (3333, 8635), (5181, 5555)]