21155175

素因数分解:

$3^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:390

約数の個数: 60

約数和(自身を含む): 40570816

約数和(自身を除く): 19415641

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 81, 93, 135, 155, 225, 279, 337, 405, 465, 675, 775, 837, 1011, 1395, 1685, 2025, 2325, 2511, 3033, 4185, 5055, 6975, 8425, 9099, 10447, 12555, 15165, 20925, 25275, 27297, 31341, 45495, 52235, 62775, 75825, 94023, 136485, 156705, 227475, 261175, 282069, 470115, 682425, 783525, 846207, 1410345, 2350575, 4231035, 7051725, 21155175]

約数ペア:

[(1, 21155175), (3, 7051725), (5, 4231035), (9, 2350575), (15, 1410345), (25, 846207), (27, 783525), (31, 682425), (45, 470115), (75, 282069), (81, 261175), (93, 227475), (135, 156705), (155, 136485), (225, 94023), (279, 75825), (337, 62775), (405, 52235), (465, 45495), (675, 31341), (775, 27297), (837, 25275), (1011, 20925), (1395, 15165), (1685, 12555), (2025, 10447), (2325, 9099), (2511, 8425), (3033, 6975), (4185, 5055)]