20298260

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{443}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 24456940

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 79, 116, 145, 158, 290, 316, 395, 443, 580, 790, 886, 1580, 1772, 2215, 2291, 4430, 4582, 8860, 9164, 11455, 12847, 22910, 25694, 34997, 45820, 51388, 64235, 69994, 128470, 139988, 174985, 256940, 349970, 699940, 1014913, 2029826, 4059652, 5074565, 10149130, 20298260]

約数ペア:

[(1, 20298260), (2, 10149130), (4, 5074565), (5, 4059652), (10, 2029826), (20, 1014913), (29, 699940), (58, 349970), (79, 256940), (116, 174985), (145, 139988), (158, 128470), (290, 69994), (316, 64235), (395, 51388), (443, 45820), (580, 34997), (790, 25694), (886, 22910), (1580, 12847), (1772, 11455), (2215, 9164), (2291, 8860), (4430, 4582)]