20781400

素因数分解:

$2^3\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3583}}^1$

素因数の和:3628

約数の個数: 48

約数和(自身を含む): 49996800

約数和(自身を除く): 29215400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 100, 116, 145, 200, 232, 290, 580, 725, 1160, 1450, 2900, 3583, 5800, 7166, 14332, 17915, 28664, 35830, 71660, 89575, 103907, 143320, 179150, 207814, 358300, 415628, 519535, 716600, 831256, 1039070, 2078140, 2597675, 4156280, 5195350, 10390700, 20781400]

約数ペア:

[(1, 20781400), (2, 10390700), (4, 5195350), (5, 4156280), (8, 2597675), (10, 2078140), (20, 1039070), (25, 831256), (29, 716600), (40, 519535), (50, 415628), (58, 358300), (100, 207814), (116, 179150), (145, 143320), (200, 103907), (232, 89575), (290, 71660), (580, 35830), (725, 28664), (1160, 17915), (1450, 14332), (2900, 7166), (3583, 5800)]