21525993

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:299

約数の個数: 40

約数和(自身を含む): 34499520

約数和(自身を除く): 12973527

約数列:

[1, 3, 9, 19, 27, 57, 71, 81, 171, 197, 213, 513, 591, 639, 1349, 1539, 1773, 1917, 3743, 4047, 5319, 5751, 11229, 12141, 13987, 15957, 33687, 36423, 41961, 101061, 109269, 125883, 265753, 303183, 377649, 797259, 1132947, 2391777, 7175331, 21525993]

約数ペア:

[(1, 21525993), (3, 7175331), (9, 2391777), (19, 1132947), (27, 797259), (57, 377649), (71, 303183), (81, 265753), (171, 125883), (197, 109269), (213, 101061), (513, 41961), (591, 36423), (639, 33687), (1349, 15957), (1539, 13987), (1773, 12141), (1917, 11229), (3743, 5751), (4047, 5319)]