21444550

素因数分解:

$2^1\times 5^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:241

約数の個数: 48

約数和(自身を含む): 41515200

約数和(自身を除く): 20070650

約数列:

[1, 2, 5, 10, 25, 50, 61, 79, 89, 122, 158, 178, 305, 395, 445, 610, 790, 890, 1525, 1975, 2225, 3050, 3950, 4450, 4819, 5429, 7031, 9638, 10858, 14062, 24095, 27145, 35155, 48190, 54290, 70310, 120475, 135725, 175775, 240950, 271450, 351550, 428891, 857782, 2144455, 4288910, 10722275, 21444550]

約数ペア:

[(1, 21444550), (2, 10722275), (5, 4288910), (10, 2144455), (25, 857782), (50, 428891), (61, 351550), (79, 271450), (89, 240950), (122, 175775), (158, 135725), (178, 120475), (305, 70310), (395, 54290), (445, 48190), (610, 35155), (790, 27145), (890, 24095), (1525, 14062), (1975, 10858), (2225, 9638), (3050, 7031), (3950, 5429), (4450, 4819)]