21961815

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{293}}^1$

素因数の和:583

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 15293865

約数列:

[1, 3, 5, 15, 19, 57, 95, 263, 285, 293, 789, 879, 1315, 1465, 3945, 4395, 4997, 5567, 14991, 16701, 24985, 27835, 74955, 77059, 83505, 231177, 385295, 1155885, 1464121, 4392363, 7320605, 21961815]

約数ペア:

[(1, 21961815), (3, 7320605), (5, 4392363), (15, 1464121), (19, 1155885), (57, 385295), (95, 231177), (263, 83505), (285, 77059), (293, 74955), (789, 27835), (879, 24985), (1315, 16701), (1465, 14991), (3945, 5567), (4395, 4997)]