20127280

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:214

約数の個数: 80

約数和(自身を含む): 49175424

約数和(自身を除く): 29048144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 53, 80, 94, 101, 106, 188, 202, 212, 235, 265, 376, 404, 424, 470, 505, 530, 752, 808, 848, 940, 1010, 1060, 1616, 1880, 2020, 2120, 2491, 3760, 4040, 4240, 4747, 4982, 5353, 8080, 9494, 9964, 10706, 12455, 18988, 19928, 21412, 23735, 24910, 26765, 37976, 39856, 42824, 47470, 49820, 53530, 75952, 85648, 94940, 99640, 107060, 189880, 199280, 214120, 251591, 379760, 428240, 503182, 1006364, 1257955, 2012728, 2515910, 4025456, 5031820, 10063640, 20127280]

約数ペア:

[(1, 20127280), (2, 10063640), (4, 5031820), (5, 4025456), (8, 2515910), (10, 2012728), (16, 1257955), (20, 1006364), (40, 503182), (47, 428240), (53, 379760), (80, 251591), (94, 214120), (101, 199280), (106, 189880), (188, 107060), (202, 99640), (212, 94940), (235, 85648), (265, 75952), (376, 53530), (404, 49820), (424, 47470), (470, 42824), (505, 39856), (530, 37976), (752, 26765), (808, 24910), (848, 23735), (940, 21412), (1010, 19928), (1060, 18988), (1616, 12455), (1880, 10706), (2020, 9964), (2120, 9494), (2491, 8080), (3760, 5353), (4040, 4982), (4240, 4747)]