21387938

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:179

約数の個数: 64

約数和(自身を含む): 41150592

約数和(自身を除く): 19762654

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 53, 83, 106, 143, 166, 187, 221, 286, 374, 442, 583, 689, 901, 913, 1079, 1166, 1378, 1411, 1802, 1826, 2158, 2431, 2822, 4399, 4862, 7579, 8798, 9911, 11713, 11869, 15158, 15521, 18343, 19822, 23426, 23738, 31042, 36686, 48389, 57187, 74783, 96778, 114374, 128843, 149566, 201773, 257686, 403546, 629057, 822613, 972179, 1258114, 1645226, 1944358, 10693969, 21387938]

約数ペア:

[(1, 21387938), (2, 10693969), (11, 1944358), (13, 1645226), (17, 1258114), (22, 972179), (26, 822613), (34, 629057), (53, 403546), (83, 257686), (106, 201773), (143, 149566), (166, 128843), (187, 114374), (221, 96778), (286, 74783), (374, 57187), (442, 48389), (583, 36686), (689, 31042), (901, 23738), (913, 23426), (1079, 19822), (1166, 18343), (1378, 15521), (1411, 15158), (1802, 11869), (1826, 11713), (2158, 9911), (2431, 8798), (2822, 7579), (4399, 4862)]