28756980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{787}}^1$

素因数の和:838

約数の個数: 144

約数和(自身を含む): 103259520

約数和(自身を除く): 74502540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 29, 30, 35, 36, 42, 45, 58, 60, 63, 70, 84, 87, 90, 105, 116, 126, 140, 145, 174, 180, 203, 210, 252, 261, 290, 315, 348, 406, 420, 435, 522, 580, 609, 630, 787, 812, 870, 1015, 1044, 1218, 1260, 1305, 1574, 1740, 1827, 2030, 2361, 2436, 2610, 3045, 3148, 3654, 3935, 4060, 4722, 5220, 5509, 6090, 7083, 7308, 7870, 9135, 9444, 11018, 11805, 12180, 14166, 15740, 16527, 18270, 22036, 22823, 23610, 27545, 28332, 33054, 35415, 36540, 45646, 47220, 49581, 55090, 66108, 68469, 70830, 82635, 91292, 99162, 110180, 114115, 136938, 141660, 159761, 165270, 198324, 205407, 228230, 247905, 273876, 319522, 330540, 342345, 410814, 456460, 479283, 495810, 639044, 684690, 798805, 821628, 958566, 991620, 1027035, 1369380, 1437849, 1597610, 1917132, 2054070, 2396415, 2875698, 3195220, 4108140, 4792830, 5751396, 7189245, 9585660, 14378490, 28756980]

約数ペア:

[(1, 28756980), (2, 14378490), (3, 9585660), (4, 7189245), (5, 5751396), (6, 4792830), (7, 4108140), (9, 3195220), (10, 2875698), (12, 2396415), (14, 2054070), (15, 1917132), (18, 1597610), (20, 1437849), (21, 1369380), (28, 1027035), (29, 991620), (30, 958566), (35, 821628), (36, 798805), (42, 684690), (45, 639044), (58, 495810), (60, 479283), (63, 456460), (70, 410814), (84, 342345), (87, 330540), (90, 319522), (105, 273876), (116, 247905), (126, 228230), (140, 205407), (145, 198324), (174, 165270), (180, 159761), (203, 141660), (210, 136938), (252, 114115), (261, 110180), (290, 99162), (315, 91292), (348, 82635), (406, 70830), (420, 68469), (435, 66108), (522, 55090), (580, 49581), (609, 47220), (630, 45646), (787, 36540), (812, 35415), (870, 33054), (1015, 28332), (1044, 27545), (1218, 23610), (1260, 22823), (1305, 22036), (1574, 18270), (1740, 16527), (1827, 15740), (2030, 14166), (2361, 12180), (2436, 11805), (2610, 11018), (3045, 9444), (3148, 9135), (3654, 7870), (3935, 7308), (4060, 7083), (4722, 6090), (5220, 5509)]