21375956

素因数分解:

$2^2\times 7^2\times {\mathrm{191}}^1\times {\mathrm{571}}^1$

素因数の和:780

約数の個数: 36

約数和(自身を含む): 43819776

約数和(自身を除く): 22443820

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 191, 196, 382, 571, 764, 1142, 1337, 2284, 2674, 3997, 5348, 7994, 9359, 15988, 18718, 27979, 37436, 55958, 109061, 111916, 218122, 436244, 763427, 1526854, 3053708, 5343989, 10687978, 21375956]

約数ペア:

[(1, 21375956), (2, 10687978), (4, 5343989), (7, 3053708), (14, 1526854), (28, 763427), (49, 436244), (98, 218122), (191, 111916), (196, 109061), (382, 55958), (571, 37436), (764, 27979), (1142, 18718), (1337, 15988), (2284, 9359), (2674, 7994), (3997, 5348)]