21000655221

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1223}}^1\times {\mathrm{2029}}^1$

素因数の和:3306

約数の個数: 64

約数和(自身を含む): 35620945920

約数和(自身を除く): 14620290699

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 217, 273, 403, 651, 1209, 1223, 2029, 2821, 3669, 6087, 8463, 8561, 14203, 15899, 25683, 26377, 37913, 42609, 47697, 62899, 79131, 111293, 113739, 184639, 188697, 265391, 333879, 440293, 492869, 553917, 796173, 817687, 1320879, 1478607, 2453061, 2481467, 3450083, 5723809, 7444401, 10350249, 17171427, 17370269, 32259071, 52110807, 76925477, 96777213, 225813497, 230776431, 538478339, 677440491, 1000031201, 1615435017, 3000093603, 7000218407, 21000655221]

約数ペア:

[(1, 21000655221), (3, 7000218407), (7, 3000093603), (13, 1615435017), (21, 1000031201), (31, 677440491), (39, 538478339), (91, 230776431), (93, 225813497), (217, 96777213), (273, 76925477), (403, 52110807), (651, 32259071), (1209, 17370269), (1223, 17171427), (2029, 10350249), (2821, 7444401), (3669, 5723809), (6087, 3450083), (8463, 2481467), (8561, 2453061), (14203, 1478607), (15899, 1320879), (25683, 817687), (26377, 796173), (37913, 553917), (42609, 492869), (47697, 440293), (62899, 333879), (79131, 265391), (111293, 188697), (113739, 184639)]