21509768

素因数分解:

$2^3\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3803}}^1$

素因数の和:3917

約数の個数: 32

約数和(自身を含む): 46560960

約数和(自身を除く): 25051192

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 101, 202, 404, 707, 808, 1414, 2828, 3803, 5656, 7606, 15212, 26621, 30424, 53242, 106484, 212968, 384103, 768206, 1536412, 2688721, 3072824, 5377442, 10754884, 21509768]

約数ペア:

[(1, 21509768), (2, 10754884), (4, 5377442), (7, 3072824), (8, 2688721), (14, 1536412), (28, 768206), (56, 384103), (101, 212968), (202, 106484), (404, 53242), (707, 30424), (808, 26621), (1414, 15212), (2828, 7606), (3803, 5656)]