221445

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:74

約数の個数: 48

約数和(自身を含む): 474240

約数和(自身を除く): 252795

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 37, 45, 57, 63, 95, 105, 111, 133, 171, 185, 259, 285, 315, 333, 399, 555, 665, 703, 777, 855, 1197, 1295, 1665, 1995, 2109, 2331, 3515, 3885, 4921, 5985, 6327, 10545, 11655, 14763, 24605, 31635, 44289, 73815, 221445]

約数ペア:

[(1, 221445), (3, 73815), (5, 44289), (7, 31635), (9, 24605), (15, 14763), (19, 11655), (21, 10545), (35, 6327), (37, 5985), (45, 4921), (57, 3885), (63, 3515), (95, 2331), (105, 2109), (111, 1995), (133, 1665), (171, 1295), (185, 1197), (259, 855), (285, 777), (315, 703), (333, 665), (399, 555)]