20399457

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{359}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 10566303

約数列:

[1, 3, 13, 31, 39, 47, 93, 141, 359, 403, 611, 1077, 1209, 1457, 1833, 4371, 4667, 11129, 14001, 16873, 18941, 33387, 50619, 56823, 144677, 219349, 434031, 523063, 658047, 1569189, 6799819, 20399457]

約数ペア:

[(1, 20399457), (3, 6799819), (13, 1569189), (31, 658047), (39, 523063), (47, 434031), (93, 219349), (141, 144677), (359, 56823), (403, 50619), (611, 33387), (1077, 18941), (1209, 16873), (1457, 14001), (1833, 11129), (4371, 4667)]