20921187

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4591}}^1$

素因数の和:4639

約数の個数: 24

約数和(自身を含む): 33503232

約数和(自身を除く): 12582045

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4591, 13773, 32137, 96411, 142321, 224959, 426963, 674877, 996247, 2988741, 6973729, 20921187]

約数ペア:

[(1, 20921187), (3, 6973729), (7, 2988741), (21, 996247), (31, 674877), (49, 426963), (93, 224959), (147, 142321), (217, 96411), (651, 32137), (1519, 13773), (4557, 4591)]