21658940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{349}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 47628000

約数和(自身を除く): 25969060

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 107, 116, 145, 214, 290, 349, 428, 535, 580, 698, 1070, 1396, 1745, 2140, 3103, 3490, 6206, 6980, 10121, 12412, 15515, 20242, 31030, 37343, 40484, 50605, 62060, 74686, 101210, 149372, 186715, 202420, 373430, 746860, 1082947, 2165894, 4331788, 5414735, 10829470, 21658940]

約数ペア:

[(1, 21658940), (2, 10829470), (4, 5414735), (5, 4331788), (10, 2165894), (20, 1082947), (29, 746860), (58, 373430), (107, 202420), (116, 186715), (145, 149372), (214, 101210), (290, 74686), (349, 62060), (428, 50605), (535, 40484), (580, 37343), (698, 31030), (1070, 20242), (1396, 15515), (1745, 12412), (2140, 10121), (3103, 6980), (3490, 6206)]