21576660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{179}}^1$

素因数の和:246

約数の個数: 144

約数和(自身を含む): 72394560

約数和(自身を除く): 50817900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 49, 60, 70, 82, 84, 98, 105, 123, 140, 147, 164, 179, 196, 205, 210, 245, 246, 287, 294, 358, 410, 420, 490, 492, 537, 574, 588, 615, 716, 735, 820, 861, 895, 980, 1074, 1148, 1230, 1253, 1435, 1470, 1722, 1790, 2009, 2148, 2460, 2506, 2685, 2870, 2940, 3444, 3580, 3759, 4018, 4305, 5012, 5370, 5740, 6027, 6265, 7339, 7518, 8036, 8610, 8771, 10045, 10740, 12054, 12530, 14678, 15036, 17220, 17542, 18795, 20090, 22017, 24108, 25060, 26313, 29356, 30135, 35084, 36695, 37590, 40180, 43855, 44034, 51373, 52626, 60270, 73390, 75180, 87710, 88068, 102746, 105252, 110085, 120540, 131565, 146780, 154119, 175420, 205492, 220170, 256865, 263130, 308238, 359611, 440340, 513730, 526260, 616476, 719222, 770595, 1027460, 1078833, 1438444, 1541190, 1798055, 2157666, 3082380, 3596110, 4315332, 5394165, 7192220, 10788330, 21576660]

約数ペア:

[(1, 21576660), (2, 10788330), (3, 7192220), (4, 5394165), (5, 4315332), (6, 3596110), (7, 3082380), (10, 2157666), (12, 1798055), (14, 1541190), (15, 1438444), (20, 1078833), (21, 1027460), (28, 770595), (30, 719222), (35, 616476), (41, 526260), (42, 513730), (49, 440340), (60, 359611), (70, 308238), (82, 263130), (84, 256865), (98, 220170), (105, 205492), (123, 175420), (140, 154119), (147, 146780), (164, 131565), (179, 120540), (196, 110085), (205, 105252), (210, 102746), (245, 88068), (246, 87710), (287, 75180), (294, 73390), (358, 60270), (410, 52626), (420, 51373), (490, 44034), (492, 43855), (537, 40180), (574, 37590), (588, 36695), (615, 35084), (716, 30135), (735, 29356), (820, 26313), (861, 25060), (895, 24108), (980, 22017), (1074, 20090), (1148, 18795), (1230, 17542), (1253, 17220), (1435, 15036), (1470, 14678), (1722, 12530), (1790, 12054), (2009, 10740), (2148, 10045), (2460, 8771), (2506, 8610), (2685, 8036), (2870, 7518), (2940, 7339), (3444, 6265), (3580, 6027), (3759, 5740), (4018, 5370), (4305, 5012)]