21298905

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{859}}^1$

素因数の和:918

約数の個数: 48

約数和(自身を含む): 40248000

約数和(自身を除く): 18949095

約数列:

[1, 3, 5, 9, 15, 19, 29, 45, 57, 87, 95, 145, 171, 261, 285, 435, 551, 855, 859, 1305, 1653, 2577, 2755, 4295, 4959, 7731, 8265, 12885, 16321, 24795, 24911, 38655, 48963, 74733, 81605, 124555, 146889, 224199, 244815, 373665, 473309, 734445, 1120995, 1419927, 2366545, 4259781, 7099635, 21298905]

約数ペア:

[(1, 21298905), (3, 7099635), (5, 4259781), (9, 2366545), (15, 1419927), (19, 1120995), (29, 734445), (45, 473309), (57, 373665), (87, 244815), (95, 224199), (145, 146889), (171, 124555), (261, 81605), (285, 74733), (435, 48963), (551, 38655), (855, 24911), (859, 24795), (1305, 16321), (1653, 12885), (2577, 8265), (2755, 7731), (4295, 4959)]