2561220

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:72

約数の個数: 144

約数和(自身を含む): 8805888

約数和(自身を除く): 6244668

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 31, 34, 36, 45, 51, 54, 60, 62, 68, 81, 85, 90, 93, 102, 108, 124, 135, 153, 155, 162, 170, 180, 186, 204, 243, 255, 270, 279, 306, 310, 324, 340, 372, 405, 459, 465, 486, 510, 527, 540, 558, 612, 620, 765, 810, 837, 918, 930, 972, 1020, 1054, 1116, 1215, 1377, 1395, 1530, 1581, 1620, 1674, 1836, 1860, 2108, 2295, 2430, 2511, 2635, 2754, 2790, 3060, 3162, 3348, 4131, 4185, 4590, 4743, 4860, 5022, 5270, 5508, 5580, 6324, 6885, 7533, 7905, 8262, 8370, 9180, 9486, 10044, 10540, 12555, 13770, 14229, 15066, 15810, 16524, 16740, 18972, 20655, 23715, 25110, 27540, 28458, 30132, 31620, 37665, 41310, 42687, 47430, 50220, 56916, 71145, 75330, 82620, 85374, 94860, 128061, 142290, 150660, 170748, 213435, 256122, 284580, 426870, 512244, 640305, 853740, 1280610, 2561220]

約数ペア:

[(1, 2561220), (2, 1280610), (3, 853740), (4, 640305), (5, 512244), (6, 426870), (9, 284580), (10, 256122), (12, 213435), (15, 170748), (17, 150660), (18, 142290), (20, 128061), (27, 94860), (30, 85374), (31, 82620), (34, 75330), (36, 71145), (45, 56916), (51, 50220), (54, 47430), (60, 42687), (62, 41310), (68, 37665), (81, 31620), (85, 30132), (90, 28458), (93, 27540), (102, 25110), (108, 23715), (124, 20655), (135, 18972), (153, 16740), (155, 16524), (162, 15810), (170, 15066), (180, 14229), (186, 13770), (204, 12555), (243, 10540), (255, 10044), (270, 9486), (279, 9180), (306, 8370), (310, 8262), (324, 7905), (340, 7533), (372, 6885), (405, 6324), (459, 5580), (465, 5508), (486, 5270), (510, 5022), (527, 4860), (540, 4743), (558, 4590), (612, 4185), (620, 4131), (765, 3348), (810, 3162), (837, 3060), (918, 2790), (930, 2754), (972, 2635), (1020, 2511), (1054, 2430), (1116, 2295), (1215, 2108), (1377, 1860), (1395, 1836), (1530, 1674), (1581, 1620)]