21276780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7237}}^1$

素因数の和:7263

約数の個数: 72

約数和(自身を含む): 69311088

約数和(自身を除く): 48034308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7237, 14474, 21711, 28948, 36185, 43422, 50659, 72370, 86844, 101318, 108555, 144740, 151977, 202636, 217110, 253295, 303954, 354613, 434220, 506590, 607908, 709226, 759885, 1013180, 1063839, 1418452, 1519770, 1773065, 2127678, 3039540, 3546130, 4255356, 5319195, 7092260, 10638390, 21276780]

約数ペア:

[(1, 21276780), (2, 10638390), (3, 7092260), (4, 5319195), (5, 4255356), (6, 3546130), (7, 3039540), (10, 2127678), (12, 1773065), (14, 1519770), (15, 1418452), (20, 1063839), (21, 1013180), (28, 759885), (30, 709226), (35, 607908), (42, 506590), (49, 434220), (60, 354613), (70, 303954), (84, 253295), (98, 217110), (105, 202636), (140, 151977), (147, 144740), (196, 108555), (210, 101318), (245, 86844), (294, 72370), (420, 50659), (490, 43422), (588, 36185), (735, 28948), (980, 21711), (1470, 14474), (2940, 7237)]