21005040

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12503}}^1$

素因数の和:12526

約数の個数: 80

約数和(自身を含む): 74423808

約数和(自身を除く): 53418768

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12503, 25006, 37509, 50012, 62515, 75018, 87521, 100024, 125030, 150036, 175042, 187545, 200048, 250060, 262563, 300072, 350084, 375090, 437605, 500120, 525126, 600144, 700168, 750180, 875210, 1000240, 1050252, 1312815, 1400336, 1500360, 1750420, 2100504, 2625630, 3000720, 3500840, 4201008, 5251260, 7001680, 10502520, 21005040]

約数ペア:

[(1, 21005040), (2, 10502520), (3, 7001680), (4, 5251260), (5, 4201008), (6, 3500840), (7, 3000720), (8, 2625630), (10, 2100504), (12, 1750420), (14, 1500360), (15, 1400336), (16, 1312815), (20, 1050252), (21, 1000240), (24, 875210), (28, 750180), (30, 700168), (35, 600144), (40, 525126), (42, 500120), (48, 437605), (56, 375090), (60, 350084), (70, 300072), (80, 262563), (84, 250060), (105, 200048), (112, 187545), (120, 175042), (140, 150036), (168, 125030), (210, 100024), (240, 87521), (280, 75018), (336, 62515), (420, 50012), (560, 37509), (840, 25006), (1680, 12503)]