21215187

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{659}}^1$

素因数の和:752

約数の個数: 36

約数和(自身を含む): 36190440

約数和(自身を除く): 14975253

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 441, 511, 657, 659, 1533, 1977, 3577, 4599, 4613, 5931, 10731, 13839, 32193, 32291, 41517, 48107, 96873, 144321, 290619, 336749, 432963, 1010247, 2357243, 3030741, 7071729, 21215187]

約数ペア:

[(1, 21215187), (3, 7071729), (7, 3030741), (9, 2357243), (21, 1010247), (49, 432963), (63, 336749), (73, 290619), (147, 144321), (219, 96873), (441, 48107), (511, 41517), (657, 32291), (659, 32193), (1533, 13839), (1977, 10731), (3577, 5931), (4599, 4613)]