21463911

素因数分解:

$3^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{409}}^1$

素因数の和:453

約数の個数: 48

約数和(自身を含む): 38376000

約数和(自身を除く): 16912089

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 343, 357, 409, 441, 833, 1029, 1071, 1227, 2499, 2863, 3087, 3681, 5831, 6953, 7497, 8589, 17493, 20041, 20859, 25767, 48671, 52479, 60123, 62577, 140287, 146013, 180369, 340697, 420861, 438039, 1022091, 1262583, 2384879, 3066273, 7154637, 21463911]

約数ペア:

[(1, 21463911), (3, 7154637), (7, 3066273), (9, 2384879), (17, 1262583), (21, 1022091), (49, 438039), (51, 420861), (63, 340697), (119, 180369), (147, 146013), (153, 140287), (343, 62577), (357, 60123), (409, 52479), (441, 48671), (833, 25767), (1029, 20859), (1071, 20041), (1227, 17493), (2499, 8589), (2863, 7497), (3087, 6953), (3681, 5831)]