28257579

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:142

約数の個数: 80

約数和(自身を含む): 52814080

約数和(自身を除く): 24556501

約数列:

[1, 3, 7, 9, 19, 21, 27, 43, 57, 61, 63, 81, 129, 133, 171, 183, 189, 301, 387, 399, 427, 513, 549, 567, 817, 903, 1159, 1161, 1197, 1281, 1539, 1647, 2451, 2623, 2709, 3477, 3483, 3591, 3843, 4941, 5719, 7353, 7869, 8113, 8127, 10431, 10773, 11529, 17157, 18361, 22059, 23607, 24339, 24381, 31293, 34587, 49837, 51471, 55083, 66177, 70821, 73017, 93879, 149511, 154413, 165249, 212463, 219051, 348859, 448533, 463239, 495747, 657153, 1046577, 1345599, 1487241, 3139731, 4036797, 9419193, 28257579]

約数ペア:

[(1, 28257579), (3, 9419193), (7, 4036797), (9, 3139731), (19, 1487241), (21, 1345599), (27, 1046577), (43, 657153), (57, 495747), (61, 463239), (63, 448533), (81, 348859), (129, 219051), (133, 212463), (171, 165249), (183, 154413), (189, 149511), (301, 93879), (387, 73017), (399, 70821), (427, 66177), (513, 55083), (549, 51471), (567, 49837), (817, 34587), (903, 31293), (1159, 24381), (1161, 24339), (1197, 23607), (1281, 22059), (1539, 18361), (1647, 17157), (2451, 11529), (2623, 10773), (2709, 10431), (3477, 8127), (3483, 8113), (3591, 7869), (3843, 7353), (4941, 5719)]