21327215

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2467}}^1$

素因数の和:2511

約数の個数: 32

約数和(自身を含む): 33169920

約数和(自身を除く): 11842705

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2467, 8645, 12335, 17269, 32071, 46873, 86345, 160355, 224497, 234365, 328111, 609349, 1122485, 1640555, 3046745, 4265443, 21327215]

約数ペア:

[(1, 21327215), (5, 4265443), (7, 3046745), (13, 1640555), (19, 1122485), (35, 609349), (65, 328111), (91, 234365), (95, 224497), (133, 160355), (247, 86345), (455, 46873), (665, 32071), (1235, 17269), (1729, 12335), (2467, 8645)]