16720893

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 29660800

約数和(自身を除く): 12939907

約数列:

[1, 3, 7, 9, 19, 21, 57, 61, 63, 133, 171, 183, 229, 399, 427, 549, 687, 1159, 1197, 1281, 1603, 2061, 3477, 3843, 4351, 4809, 8113, 10431, 13053, 13969, 14427, 24339, 30457, 39159, 41907, 73017, 91371, 97783, 125721, 265411, 274113, 293349, 796233, 880047, 1857877, 2388699, 5573631, 16720893]

約数ペア:

[(1, 16720893), (3, 5573631), (7, 2388699), (9, 1857877), (19, 880047), (21, 796233), (57, 293349), (61, 274113), (63, 265411), (133, 125721), (171, 97783), (183, 91371), (229, 73017), (399, 41907), (427, 39159), (549, 30457), (687, 24339), (1159, 14427), (1197, 13969), (1281, 13053), (1603, 10431), (2061, 8113), (3477, 4809), (3843, 4351)]