778996840

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:311

約数の個数: 128

約数和(自身を含む): 1878228000

約数和(自身を除く): 1099231160

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 61, 101, 109, 116, 122, 145, 202, 218, 232, 244, 290, 305, 404, 436, 488, 505, 545, 580, 610, 808, 872, 1010, 1090, 1160, 1220, 1769, 2020, 2180, 2440, 2929, 3161, 3538, 4040, 4360, 5858, 6161, 6322, 6649, 7076, 8845, 11009, 11716, 12322, 12644, 13298, 14152, 14645, 15805, 17690, 22018, 23432, 24644, 25288, 26596, 29290, 30805, 31610, 33245, 35380, 44036, 49288, 53192, 55045, 58580, 61610, 63220, 66490, 70760, 88072, 110090, 117160, 123220, 126440, 132980, 178669, 192821, 220180, 246440, 265960, 319261, 357338, 385642, 440360, 638522, 671549, 714676, 771284, 893345, 964105, 1277044, 1343098, 1429352, 1542568, 1596305, 1786690, 1928210, 2554088, 2686196, 3192610, 3357745, 3573380, 3856420, 5372392, 6385220, 6715490, 7146760, 7712840, 12770440, 13430980, 19474921, 26861960, 38949842, 77899684, 97374605, 155799368, 194749210, 389498420, 778996840]

約数ペア:

[(1, 778996840), (2, 389498420), (4, 194749210), (5, 155799368), (8, 97374605), (10, 77899684), (20, 38949842), (29, 26861960), (40, 19474921), (58, 13430980), (61, 12770440), (101, 7712840), (109, 7146760), (116, 6715490), (122, 6385220), (145, 5372392), (202, 3856420), (218, 3573380), (232, 3357745), (244, 3192610), (290, 2686196), (305, 2554088), (404, 1928210), (436, 1786690), (488, 1596305), (505, 1542568), (545, 1429352), (580, 1343098), (610, 1277044), (808, 964105), (872, 893345), (1010, 771284), (1090, 714676), (1160, 671549), (1220, 638522), (1769, 440360), (2020, 385642), (2180, 357338), (2440, 319261), (2929, 265960), (3161, 246440), (3538, 220180), (4040, 192821), (4360, 178669), (5858, 132980), (6161, 126440), (6322, 123220), (6649, 117160), (7076, 110090), (8845, 88072), (11009, 70760), (11716, 66490), (12322, 63220), (12644, 61610), (13298, 58580), (14152, 55045), (14645, 53192), (15805, 49288), (17690, 44036), (22018, 35380), (23432, 33245), (24644, 31610), (25288, 30805), (26596, 29290)]