21821250.000000000

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{41737}}^1$

素因数の和:41763

約数の個数: 72

約数和(自身を含む): 399683088

約数和(自身を除く): 276976308

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, 41737, 83474, 125211, 166948, 208685, 250422, 292159, 417370, 500844, 584318, 626055, 834740, 876477, 1168636, 1252110, 1460795, 1752954, 2045113, 2504220, 2921590, 3505908, 4090226, 4382385, 5843180, 6135339, 8180452, 8764770, 10225565, 12270678, 17529540, 20451130, 24541356, 30676695, 40902260, 61353390, 122706780]

約数ペア:

[(1, 122706780), (2, 61353390), (3, 40902260), (4, 30676695), (5, 24541356), (6, 20451130), (7, 17529540), (10, 12270678), (12, 10225565), (14, 8764770), (15, 8180452), (20, 6135339), (21, 5843180), (28, 4382385), (30, 4090226), (35, 3505908), (42, 2921590), (49, 2504220), (60, 2045113), (70, 1752954), (84, 1460795), (98, 1252110), (105, 1168636), (140, 876477), (147, 834740), (196, 626055), (210, 584318), (245, 500844), (294, 417370), (420, 292159), (490, 250422), (588, 208685), (735, 166948), (980, 125211), (1470, 83474), (2940, 41737)]