21142305

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{953}}^1$

素因数の和:1010

約数の個数: 48

約数和(自身を含む): 40182480

約数和(自身を除く): 19040175

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 953, 1305, 1479, 2465, 2859, 4437, 4765, 7395, 8577, 14295, 16201, 22185, 27637, 42885, 48603, 81005, 82911, 138185, 145809, 243015, 248733, 414555, 469829, 729045, 1243665, 1409487, 2349145, 4228461, 7047435, 21142305]

約数ペア:

[(1, 21142305), (3, 7047435), (5, 4228461), (9, 2349145), (15, 1409487), (17, 1243665), (29, 729045), (45, 469829), (51, 414555), (85, 248733), (87, 243015), (145, 145809), (153, 138185), (255, 82911), (261, 81005), (435, 48603), (493, 42885), (765, 27637), (953, 22185), (1305, 16201), (1479, 14295), (2465, 8577), (2859, 7395), (4437, 4765)]