20941740

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 68490240

約数和(自身を除く): 47548500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 31, 36, 45, 54, 60, 62, 81, 90, 93, 108, 124, 135, 139, 155, 162, 180, 186, 243, 270, 278, 279, 310, 324, 372, 405, 417, 465, 486, 540, 556, 558, 620, 695, 810, 834, 837, 930, 972, 1116, 1215, 1251, 1390, 1395, 1620, 1668, 1674, 1860, 2085, 2430, 2502, 2511, 2780, 2790, 3348, 3753, 4170, 4185, 4309, 4860, 5004, 5022, 5580, 6255, 7506, 7533, 8340, 8370, 8618, 10044, 11259, 12510, 12555, 12927, 15012, 15066, 16740, 17236, 18765, 21545, 22518, 25020, 25110, 25854, 30132, 33777, 37530, 37665, 38781, 43090, 45036, 50220, 51708, 56295, 64635, 67554, 75060, 75330, 77562, 86180, 112590, 116343, 129270, 135108, 150660, 155124, 168885, 193905, 225180, 232686, 258540, 337770, 349029, 387810, 465372, 581715, 675540, 698058, 775620, 1047087, 1163430, 1396116, 1745145, 2094174, 2326860, 3490290, 4188348, 5235435, 6980580, 10470870, 20941740]

約数ペア:

[(1, 20941740), (2, 10470870), (3, 6980580), (4, 5235435), (5, 4188348), (6, 3490290), (9, 2326860), (10, 2094174), (12, 1745145), (15, 1396116), (18, 1163430), (20, 1047087), (27, 775620), (30, 698058), (31, 675540), (36, 581715), (45, 465372), (54, 387810), (60, 349029), (62, 337770), (81, 258540), (90, 232686), (93, 225180), (108, 193905), (124, 168885), (135, 155124), (139, 150660), (155, 135108), (162, 129270), (180, 116343), (186, 112590), (243, 86180), (270, 77562), (278, 75330), (279, 75060), (310, 67554), (324, 64635), (372, 56295), (405, 51708), (417, 50220), (465, 45036), (486, 43090), (540, 38781), (556, 37665), (558, 37530), (620, 33777), (695, 30132), (810, 25854), (834, 25110), (837, 25020), (930, 22518), (972, 21545), (1116, 18765), (1215, 17236), (1251, 16740), (1390, 15066), (1395, 15012), (1620, 12927), (1668, 12555), (1674, 12510), (1860, 11259), (2085, 10044), (2430, 8618), (2502, 8370), (2511, 8340), (2780, 7533), (2790, 7506), (3348, 6255), (3753, 5580), (4170, 5022), (4185, 5004), (4309, 4860)]