21200340

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7211}}^1$

素因数の和:7237

約数の個数: 72

約数和(自身を含む): 69062112

約数和(自身を除く): 47861772

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, 7211, 14422, 21633, 28844, 36055, 43266, 50477, 72110, 86532, 100954, 108165, 144220, 151431, 201908, 216330, 252385, 302862, 353339, 432660, 504770, 605724, 706678, 757155, 1009540, 1060017, 1413356, 1514310, 1766695, 2120034, 3028620, 3533390, 4240068, 5300085, 7066780, 10600170, 21200340]

約数ペア:

[(1, 21200340), (2, 10600170), (3, 7066780), (4, 5300085), (5, 4240068), (6, 3533390), (7, 3028620), (10, 2120034), (12, 1766695), (14, 1514310), (15, 1413356), (20, 1060017), (21, 1009540), (28, 757155), (30, 706678), (35, 605724), (42, 504770), (49, 432660), (60, 353339), (70, 302862), (84, 252385), (98, 216330), (105, 201908), (140, 151431), (147, 144220), (196, 108165), (210, 100954), (245, 86532), (294, 72110), (420, 50477), (490, 43266), (588, 36055), (735, 28844), (980, 21633), (1470, 14422), (2940, 7211)]