21078225

素因数分解:

$3^4\times 5^2\times 7^1\times {\mathrm{1487}}^1$

素因数の和:1516

約数の個数: 60

約数和(自身を含む): 44651904

約数和(自身を除く): 23573679

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 63, 75, 81, 105, 135, 175, 189, 225, 315, 405, 525, 567, 675, 945, 1487, 1575, 2025, 2835, 4461, 4725, 7435, 10409, 13383, 14175, 22305, 31227, 37175, 40149, 52045, 66915, 93681, 111525, 120447, 156135, 200745, 260225, 281043, 334575, 468405, 602235, 780675, 843129, 1003725, 1405215, 2342025, 3011175, 4215645, 7026075, 21078225]

約数ペア:

[(1, 21078225), (3, 7026075), (5, 4215645), (7, 3011175), (9, 2342025), (15, 1405215), (21, 1003725), (25, 843129), (27, 780675), (35, 602235), (45, 468405), (63, 334575), (75, 281043), (81, 260225), (105, 200745), (135, 156135), (175, 120447), (189, 111525), (225, 93681), (315, 66915), (405, 52045), (525, 40149), (567, 37175), (675, 31227), (945, 22305), (1487, 14175), (1575, 13383), (2025, 10409), (2835, 7435), (4461, 4725)]