221521937

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 279229440

約数和(自身を除く): 57707503

約数列:

[1, 7, 13, 83, 91, 139, 211, 581, 973, 1079, 1477, 1807, 2743, 7553, 11537, 12649, 17513, 19201, 29329, 80759, 122591, 149981, 205303, 227669, 381277, 1049867, 1593683, 2434307, 2668939, 17040149, 31645991, 221521937]

約数ペア:

[(1, 221521937), (7, 31645991), (13, 17040149), (83, 2668939), (91, 2434307), (139, 1593683), (211, 1049867), (581, 381277), (973, 227669), (1079, 205303), (1477, 149981), (1807, 122591), (2743, 80759), (7553, 29329), (11537, 19201), (12649, 17513)]