21921753

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 34481920

約数和(自身を除く): 12560167

約数列:

[1, 3, 7, 21, 61, 109, 157, 183, 327, 427, 471, 763, 1099, 1281, 2289, 3297, 6649, 9577, 17113, 19947, 28731, 46543, 51339, 67039, 119791, 139629, 201117, 359373, 1043893, 3131679, 7307251, 21921753]

約数ペア:

[(1, 21921753), (3, 7307251), (7, 3131679), (21, 1043893), (61, 359373), (109, 201117), (157, 139629), (183, 119791), (327, 67039), (427, 51339), (471, 46543), (763, 28731), (1099, 19947), (1281, 17113), (2289, 9577), (3297, 6649)]