21139550

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1$

素因数の和:341

約数の個数: 48

約数和(自身を含む): 41515200

約数和(自身を除く): 20375650

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 61, 122, 145, 239, 290, 305, 478, 610, 725, 1195, 1450, 1525, 1769, 2390, 3050, 3538, 5975, 6931, 8845, 11950, 13862, 14579, 17690, 29158, 34655, 44225, 69310, 72895, 88450, 145790, 173275, 346550, 364475, 422791, 728950, 845582, 2113955, 4227910, 10569775, 21139550]

約数ペア:

[(1, 21139550), (2, 10569775), (5, 4227910), (10, 2113955), (25, 845582), (29, 728950), (50, 422791), (58, 364475), (61, 346550), (122, 173275), (145, 145790), (239, 88450), (290, 72895), (305, 69310), (478, 44225), (610, 34655), (725, 29158), (1195, 17690), (1450, 14579), (1525, 13862), (1769, 11950), (2390, 8845), (3050, 6931), (3538, 5975)]