21605880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{449}}^1$

素因数の和:864

約数の個数: 64

約数和(自身を含む): 65124000

約数和(自身を除く): 43518120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 401, 449, 802, 898, 1203, 1347, 1604, 1796, 2005, 2245, 2406, 2694, 3208, 3592, 4010, 4490, 4812, 5388, 6015, 6735, 8020, 8980, 9624, 10776, 12030, 13470, 16040, 17960, 24060, 26940, 48120, 53880, 180049, 360098, 540147, 720196, 900245, 1080294, 1440392, 1800490, 2160588, 2700735, 3600980, 4321176, 5401470, 7201960, 10802940, 21605880]

約数ペア:

[(1, 21605880), (2, 10802940), (3, 7201960), (4, 5401470), (5, 4321176), (6, 3600980), (8, 2700735), (10, 2160588), (12, 1800490), (15, 1440392), (20, 1080294), (24, 900245), (30, 720196), (40, 540147), (60, 360098), (120, 180049), (401, 53880), (449, 48120), (802, 26940), (898, 24060), (1203, 17960), (1347, 16040), (1604, 13470), (1796, 12030), (2005, 10776), (2245, 9624), (2406, 8980), (2694, 8020), (3208, 6735), (3592, 6015), (4010, 5388), (4490, 4812)]