21010675

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 11130125

約数列:

[1, 5, 7, 19, 25, 35, 71, 89, 95, 133, 175, 355, 445, 475, 497, 623, 665, 1349, 1691, 1775, 2225, 2485, 3115, 3325, 6319, 6745, 8455, 9443, 11837, 12425, 15575, 31595, 33725, 42275, 44233, 47215, 59185, 120061, 157975, 221165, 236075, 295925, 600305, 840427, 1105825, 3001525, 4202135, 21010675]

約数ペア:

[(1, 21010675), (5, 4202135), (7, 3001525), (19, 1105825), (25, 840427), (35, 600305), (71, 295925), (89, 236075), (95, 221165), (133, 157975), (175, 120061), (355, 59185), (445, 47215), (475, 44233), (497, 42275), (623, 33725), (665, 31595), (1349, 15575), (1691, 12425), (1775, 11837), (2225, 9443), (2485, 8455), (3115, 6745), (3325, 6319)]