20910740

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1163}}^1$

素因数の和:1232

約数の個数: 48

約数和(自身を含む): 46932480

約数和(自身を除く): 26021740

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1163, 1798, 2326, 3596, 4495, 4652, 5815, 8990, 11630, 17980, 23260, 33727, 36053, 67454, 72106, 134908, 144212, 168635, 180265, 337270, 360530, 674540, 721060, 1045537, 2091074, 4182148, 5227685, 10455370, 20910740]

約数ペア:

[(1, 20910740), (2, 10455370), (4, 5227685), (5, 4182148), (10, 2091074), (20, 1045537), (29, 721060), (31, 674540), (58, 360530), (62, 337270), (116, 180265), (124, 168635), (145, 144212), (155, 134908), (290, 72106), (310, 67454), (580, 36053), (620, 33727), (899, 23260), (1163, 17980), (1798, 11630), (2326, 8990), (3596, 5815), (4495, 4652)]