21555900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:620

約数の個数: 108

約数和(自身を含む): 69261192

約数和(自身を除く): 47705292

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 43, 45, 50, 60, 75, 86, 90, 100, 129, 150, 172, 180, 215, 225, 258, 300, 387, 430, 450, 516, 557, 645, 774, 860, 900, 1075, 1114, 1290, 1548, 1671, 1935, 2150, 2228, 2580, 2785, 3225, 3342, 3870, 4300, 5013, 5570, 6450, 6684, 7740, 8355, 9675, 10026, 11140, 12900, 13925, 16710, 19350, 20052, 23951, 25065, 27850, 33420, 38700, 41775, 47902, 50130, 55700, 71853, 83550, 95804, 100260, 119755, 125325, 143706, 167100, 215559, 239510, 250650, 287412, 359265, 431118, 479020, 501300, 598775, 718530, 862236, 1077795, 1197550, 1437060, 1796325, 2155590, 2395100, 3592650, 4311180, 5388975, 7185300, 10777950, 21555900]

約数ペア:

[(1, 21555900), (2, 10777950), (3, 7185300), (4, 5388975), (5, 4311180), (6, 3592650), (9, 2395100), (10, 2155590), (12, 1796325), (15, 1437060), (18, 1197550), (20, 1077795), (25, 862236), (30, 718530), (36, 598775), (43, 501300), (45, 479020), (50, 431118), (60, 359265), (75, 287412), (86, 250650), (90, 239510), (100, 215559), (129, 167100), (150, 143706), (172, 125325), (180, 119755), (215, 100260), (225, 95804), (258, 83550), (300, 71853), (387, 55700), (430, 50130), (450, 47902), (516, 41775), (557, 38700), (645, 33420), (774, 27850), (860, 25065), (900, 23951), (1075, 20052), (1114, 19350), (1290, 16710), (1548, 13925), (1671, 12900), (1935, 11140), (2150, 10026), (2228, 9675), (2580, 8355), (2785, 7740), (3225, 6684), (3342, 6450), (3870, 5570), (4300, 5013)]