21066075

素因数分解:

$3^4\times 5^2\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:226

約数の個数: 60

約数和(自身を含む): 39790608

約数和(自身を除く): 18724533

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 101, 103, 135, 225, 303, 309, 405, 505, 515, 675, 909, 927, 1515, 1545, 2025, 2525, 2575, 2727, 2781, 4545, 4635, 7575, 7725, 8181, 8343, 10403, 13635, 13905, 22725, 23175, 31209, 40905, 41715, 52015, 68175, 69525, 93627, 156045, 204525, 208575, 260075, 280881, 468135, 780225, 842643, 1404405, 2340675, 4213215, 7022025, 21066075]

約数ペア:

[(1, 21066075), (3, 7022025), (5, 4213215), (9, 2340675), (15, 1404405), (25, 842643), (27, 780225), (45, 468135), (75, 280881), (81, 260075), (101, 208575), (103, 204525), (135, 156045), (225, 93627), (303, 69525), (309, 68175), (405, 52015), (505, 41715), (515, 40905), (675, 31209), (909, 23175), (927, 22725), (1515, 13905), (1545, 13635), (2025, 10403), (2525, 8343), (2575, 8181), (2727, 7725), (2781, 7575), (4545, 4635)]