20778428

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{6469}}^1$

素因数の和:6557

約数の個数: 24

約数和(自身を含む): 40217520

約数和(自身を除く): 19439092

約数列:

[1, 2, 4, 11, 22, 44, 73, 146, 292, 803, 1606, 3212, 6469, 12938, 25876, 71159, 142318, 284636, 472237, 944474, 1888948, 5194607, 10389214, 20778428]

約数ペア:

[(1, 20778428), (2, 10389214), (4, 5194607), (11, 1888948), (22, 944474), (44, 472237), (73, 284636), (146, 142318), (292, 71159), (803, 25876), (1606, 12938), (3212, 6469)]