21531405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4363}}^1$

素因数の和:4425

約数の個数: 32

約数和(自身を含む): 40218624

約数和(自身を除く): 18687219

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4363, 4935, 13089, 21815, 30541, 65445, 91623, 152705, 205061, 458115, 615183, 1025305, 1435427, 3075915, 4306281, 7177135, 21531405]

約数ペア:

[(1, 21531405), (3, 7177135), (5, 4306281), (7, 3075915), (15, 1435427), (21, 1025305), (35, 615183), (47, 458115), (105, 205061), (141, 152705), (235, 91623), (329, 65445), (705, 30541), (987, 21815), (1645, 13089), (4363, 4935)]