21957075

素因数分解:

$3^4\times 5^2\times 7^1\times {\mathrm{1549}}^1$

素因数の和:1578

約数の個数: 60

約数和(自身を含む): 46512400

約数和(自身を除く): 24555325

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, 1549, 1575, 2025, 2835, 4647, 4725, 7745, 10843, 13941, 14175, 23235, 32529, 38725, 41823, 54215, 69705, 97587, 116175, 125469, 162645, 209115, 271075, 292761, 348525, 487935, 627345, 813225, 878283, 1045575, 1463805, 2439675, 3136725, 4391415, 7319025, 21957075]

約数ペア:

[(1, 21957075), (3, 7319025), (5, 4391415), (7, 3136725), (9, 2439675), (15, 1463805), (21, 1045575), (25, 878283), (27, 813225), (35, 627345), (45, 487935), (63, 348525), (75, 292761), (81, 271075), (105, 209115), (135, 162645), (175, 125469), (189, 116175), (225, 97587), (315, 69705), (405, 54215), (525, 41823), (567, 38725), (675, 32529), (945, 23235), (1549, 14175), (1575, 13941), (2025, 10843), (2835, 7745), (4647, 4725)]