21263175

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^2\times {\mathrm{109}}^1$

素因数の和:162

約数の個数: 72

約数和(自身を含む): 41874800

約数和(自身を除く): 20611625

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 109, 135, 153, 225, 255, 289, 327, 425, 459, 545, 675, 765, 867, 981, 1275, 1445, 1635, 1853, 2295, 2601, 2725, 2943, 3825, 4335, 4905, 5559, 7225, 7803, 8175, 9265, 11475, 13005, 14715, 16677, 21675, 24525, 27795, 31501, 39015, 46325, 50031, 65025, 73575, 83385, 94503, 138975, 157505, 195075, 250155, 283509, 416925, 472515, 787525, 850527, 1250775, 1417545, 2362575, 4252635, 7087725, 21263175]

約数ペア:

[(1, 21263175), (3, 7087725), (5, 4252635), (9, 2362575), (15, 1417545), (17, 1250775), (25, 850527), (27, 787525), (45, 472515), (51, 416925), (75, 283509), (85, 250155), (109, 195075), (135, 157505), (153, 138975), (225, 94503), (255, 83385), (289, 73575), (327, 65025), (425, 50031), (459, 46325), (545, 39015), (675, 31501), (765, 27795), (867, 24525), (981, 21675), (1275, 16677), (1445, 14715), (1635, 13005), (1853, 11475), (2295, 9265), (2601, 8175), (2725, 7803), (2943, 7225), (3825, 5559), (4335, 4905)]