28378980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:346

約数の個数: 144

約数和(自身を含む): 99800064

約数和(自身を除く): 71421084

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, 101, 105, 126, 140, 180, 202, 210, 223, 252, 303, 315, 404, 420, 446, 505, 606, 630, 669, 707, 892, 909, 1010, 1115, 1212, 1260, 1338, 1414, 1515, 1561, 1818, 2007, 2020, 2121, 2230, 2676, 2828, 3030, 3122, 3345, 3535, 3636, 4014, 4242, 4460, 4545, 4683, 6060, 6244, 6363, 6690, 7070, 7805, 8028, 8484, 9090, 9366, 10035, 10605, 12726, 13380, 14049, 14140, 15610, 18180, 18732, 20070, 21210, 22523, 23415, 25452, 28098, 31220, 31815, 40140, 42420, 45046, 46830, 56196, 63630, 67569, 70245, 90092, 93660, 112615, 127260, 135138, 140490, 157661, 202707, 225230, 270276, 280980, 315322, 337845, 405414, 450460, 472983, 630644, 675690, 788305, 810828, 945966, 1013535, 1351380, 1418949, 1576610, 1891932, 2027070, 2364915, 2837898, 3153220, 4054140, 4729830, 5675796, 7094745, 9459660, 14189490, 28378980]

約数ペア:

[(1, 28378980), (2, 14189490), (3, 9459660), (4, 7094745), (5, 5675796), (6, 4729830), (7, 4054140), (9, 3153220), (10, 2837898), (12, 2364915), (14, 2027070), (15, 1891932), (18, 1576610), (20, 1418949), (21, 1351380), (28, 1013535), (30, 945966), (35, 810828), (36, 788305), (42, 675690), (45, 630644), (60, 472983), (63, 450460), (70, 405414), (84, 337845), (90, 315322), (101, 280980), (105, 270276), (126, 225230), (140, 202707), (180, 157661), (202, 140490), (210, 135138), (223, 127260), (252, 112615), (303, 93660), (315, 90092), (404, 70245), (420, 67569), (446, 63630), (505, 56196), (606, 46830), (630, 45046), (669, 42420), (707, 40140), (892, 31815), (909, 31220), (1010, 28098), (1115, 25452), (1212, 23415), (1260, 22523), (1338, 21210), (1414, 20070), (1515, 18732), (1561, 18180), (1818, 15610), (2007, 14140), (2020, 14049), (2121, 13380), (2230, 12726), (2676, 10605), (2828, 10035), (3030, 9366), (3122, 9090), (3345, 8484), (3535, 8028), (3636, 7805), (4014, 7070), (4242, 6690), (4460, 6363), (4545, 6244), (4683, 6060)]