21931371

素因数分解:

$3^3\times 7^2\times {\mathrm{11}}^2\times {\mathrm{137}}^1$

素因数の和:182

約数の個数: 72

約数和(自身を含む): 41847120

約数和(自身を除く): 19915749

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 99, 121, 137, 147, 189, 231, 297, 363, 411, 441, 539, 693, 847, 959, 1089, 1233, 1323, 1507, 1617, 2079, 2541, 2877, 3267, 3699, 4521, 4851, 5929, 6713, 7623, 8631, 10549, 13563, 14553, 16577, 17787, 20139, 22869, 25893, 31647, 40689, 49731, 53361, 60417, 73843, 94941, 116039, 149193, 160083, 181251, 221529, 284823, 348117, 447579, 664587, 812273, 1044351, 1993761, 2436819, 3133053, 7310457, 21931371]

約数ペア:

[(1, 21931371), (3, 7310457), (7, 3133053), (9, 2436819), (11, 1993761), (21, 1044351), (27, 812273), (33, 664587), (49, 447579), (63, 348117), (77, 284823), (99, 221529), (121, 181251), (137, 160083), (147, 149193), (189, 116039), (231, 94941), (297, 73843), (363, 60417), (411, 53361), (441, 49731), (539, 40689), (693, 31647), (847, 25893), (959, 22869), (1089, 20139), (1233, 17787), (1323, 16577), (1507, 14553), (1617, 13563), (2079, 10549), (2541, 8631), (2877, 7623), (3267, 6713), (3699, 5929), (4521, 4851)]