19949864

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 23181016

約数列:

[1, 2, 4, 8, 11, 22, 31, 44, 62, 71, 88, 103, 124, 142, 206, 248, 284, 341, 412, 568, 682, 781, 824, 1133, 1364, 1562, 2201, 2266, 2728, 3124, 3193, 4402, 4532, 6248, 6386, 7313, 8804, 9064, 12772, 14626, 17608, 24211, 25544, 29252, 35123, 48422, 58504, 70246, 80443, 96844, 140492, 160886, 193688, 226703, 280984, 321772, 453406, 643544, 906812, 1813624, 2493733, 4987466, 9974932, 19949864]

約数ペア:

[(1, 19949864), (2, 9974932), (4, 4987466), (8, 2493733), (11, 1813624), (22, 906812), (31, 643544), (44, 453406), (62, 321772), (71, 280984), (88, 226703), (103, 193688), (124, 160886), (142, 140492), (206, 96844), (248, 80443), (284, 70246), (341, 58504), (412, 48422), (568, 35123), (682, 29252), (781, 25544), (824, 24211), (1133, 17608), (1364, 14626), (1562, 12772), (2201, 9064), (2266, 8804), (2728, 7313), (3124, 6386), (3193, 6248), (4402, 4532)]