21690490

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{691}}^1$

素因数の和:814

約数の個数: 32

約数和(自身を含む): 40556736

約数和(自身を除く): 18866246

約数列:

[1, 2, 5, 10, 43, 73, 86, 146, 215, 365, 430, 691, 730, 1382, 3139, 3455, 6278, 6910, 15695, 29713, 31390, 50443, 59426, 100886, 148565, 252215, 297130, 504430, 2169049, 4338098, 10845245, 21690490]

約数ペア:

[(1, 21690490), (2, 10845245), (5, 4338098), (10, 2169049), (43, 504430), (73, 297130), (86, 252215), (146, 148565), (215, 100886), (365, 59426), (430, 50443), (691, 31390), (730, 29713), (1382, 15695), (3139, 6910), (3455, 6278)]