257320980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{443}}^1\times {\mathrm{461}}^1$

素因数の和:926

約数の個数: 144

約数和(自身を含む): 895999104

約数和(自身を除く): 638678124

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 443, 461, 630, 886, 922, 1260, 1329, 1383, 1772, 1844, 2215, 2305, 2658, 2766, 3101, 3227, 3987, 4149, 4430, 4610, 5316, 5532, 6202, 6454, 6645, 6915, 7974, 8298, 8860, 9220, 9303, 9681, 12404, 12908, 13290, 13830, 15505, 15948, 16135, 16596, 18606, 19362, 19935, 20745, 26580, 27660, 27909, 29043, 31010, 32270, 37212, 38724, 39870, 41490, 46515, 48405, 55818, 58086, 62020, 64540, 79740, 82980, 93030, 96810, 111636, 116172, 139545, 145215, 186060, 193620, 204223, 279090, 290430, 408446, 558180, 580860, 612669, 816892, 1021115, 1225338, 1429561, 1838007, 2042230, 2450676, 2859122, 3063345, 3676014, 4084460, 4288683, 5718244, 6126690, 7147805, 7352028, 8577366, 9190035, 12253380, 12866049, 14295610, 17154732, 18380070, 21443415, 25732098, 28591220, 36760140, 42886830, 51464196, 64330245, 85773660, 128660490, 257320980]

約数ペア:

[(1, 257320980), (2, 128660490), (3, 85773660), (4, 64330245), (5, 51464196), (6, 42886830), (7, 36760140), (9, 28591220), (10, 25732098), (12, 21443415), (14, 18380070), (15, 17154732), (18, 14295610), (20, 12866049), (21, 12253380), (28, 9190035), (30, 8577366), (35, 7352028), (36, 7147805), (42, 6126690), (45, 5718244), (60, 4288683), (63, 4084460), (70, 3676014), (84, 3063345), (90, 2859122), (105, 2450676), (126, 2042230), (140, 1838007), (180, 1429561), (210, 1225338), (252, 1021115), (315, 816892), (420, 612669), (443, 580860), (461, 558180), (630, 408446), (886, 290430), (922, 279090), (1260, 204223), (1329, 193620), (1383, 186060), (1772, 145215), (1844, 139545), (2215, 116172), (2305, 111636), (2658, 96810), (2766, 93030), (3101, 82980), (3227, 79740), (3987, 64540), (4149, 62020), (4430, 58086), (4610, 55818), (5316, 48405), (5532, 46515), (6202, 41490), (6454, 39870), (6645, 38724), (6915, 37212), (7974, 32270), (8298, 31010), (8860, 29043), (9220, 27909), (9303, 27660), (9681, 26580), (12404, 20745), (12908, 19935), (13290, 19362), (13830, 18606), (15505, 16596), (15948, 16135)]