21791030

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 40309920

約数和(自身を除く): 18518890

約数列:

[1, 2, 5, 10, 61, 122, 139, 257, 278, 305, 514, 610, 695, 1285, 1390, 2570, 8479, 15677, 16958, 31354, 35723, 42395, 71446, 78385, 84790, 156770, 178615, 357230, 2179103, 4358206, 10895515, 21791030]

約数ペア:

[(1, 21791030), (2, 10895515), (5, 4358206), (10, 2179103), (61, 357230), (122, 178615), (139, 156770), (257, 84790), (278, 78385), (305, 71446), (514, 42395), (610, 35723), (695, 31354), (1285, 16958), (1390, 15677), (2570, 8479)]