20715660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1$

素因数の和:464

約数の個数: 144

約数和(自身を含む): 73749312

約数和(自身を除く): 53033652

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 41, 42, 45, 60, 63, 70, 82, 84, 90, 105, 123, 126, 140, 164, 180, 205, 210, 246, 252, 287, 315, 369, 401, 410, 420, 492, 574, 615, 630, 738, 802, 820, 861, 1148, 1203, 1230, 1260, 1435, 1476, 1604, 1722, 1845, 2005, 2406, 2460, 2583, 2807, 2870, 3444, 3609, 3690, 4010, 4305, 4812, 5166, 5614, 5740, 6015, 7218, 7380, 8020, 8421, 8610, 10332, 11228, 12030, 12915, 14035, 14436, 16441, 16842, 17220, 18045, 24060, 25263, 25830, 28070, 32882, 33684, 36090, 42105, 49323, 50526, 51660, 56140, 65764, 72180, 82205, 84210, 98646, 101052, 115087, 126315, 147969, 164410, 168420, 197292, 230174, 246615, 252630, 295938, 328820, 345261, 460348, 493230, 505260, 575435, 591876, 690522, 739845, 986460, 1035783, 1150870, 1381044, 1479690, 1726305, 2071566, 2301740, 2959380, 3452610, 4143132, 5178915, 6905220, 10357830, 20715660]

約数ペア:

[(1, 20715660), (2, 10357830), (3, 6905220), (4, 5178915), (5, 4143132), (6, 3452610), (7, 2959380), (9, 2301740), (10, 2071566), (12, 1726305), (14, 1479690), (15, 1381044), (18, 1150870), (20, 1035783), (21, 986460), (28, 739845), (30, 690522), (35, 591876), (36, 575435), (41, 505260), (42, 493230), (45, 460348), (60, 345261), (63, 328820), (70, 295938), (82, 252630), (84, 246615), (90, 230174), (105, 197292), (123, 168420), (126, 164410), (140, 147969), (164, 126315), (180, 115087), (205, 101052), (210, 98646), (246, 84210), (252, 82205), (287, 72180), (315, 65764), (369, 56140), (401, 51660), (410, 50526), (420, 49323), (492, 42105), (574, 36090), (615, 33684), (630, 32882), (738, 28070), (802, 25830), (820, 25263), (861, 24060), (1148, 18045), (1203, 17220), (1230, 16842), (1260, 16441), (1435, 14436), (1476, 14035), (1604, 12915), (1722, 12030), (1845, 11228), (2005, 10332), (2406, 8610), (2460, 8421), (2583, 8020), (2807, 7380), (2870, 7218), (3444, 6015), (3609, 5740), (3690, 5614), (4010, 5166), (4305, 4812)]