21000298475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{349}}^1\times {\mathrm{10891}}^1$

素因数の和:11280

約数の個数: 48

約数和(自身を含む): 29780906400

約数和(自身を除く): 8780607925

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 349, 425, 1105, 1745, 4537, 5525, 5933, 8725, 10891, 22685, 29665, 54455, 77129, 113425, 141583, 148325, 185147, 272275, 385645, 707915, 925735, 1928225, 2406911, 3539575, 3800959, 4628675, 12034555, 19004795, 49412467, 60172775, 64616303, 95023975, 247062335, 323081515, 840011939, 1235311675, 1615407575, 4200059695, 21000298475]

約数ペア:

[(1, 21000298475), (5, 4200059695), (13, 1615407575), (17, 1235311675), (25, 840011939), (65, 323081515), (85, 247062335), (221, 95023975), (325, 64616303), (349, 60172775), (425, 49412467), (1105, 19004795), (1745, 12034555), (4537, 4628675), (5525, 3800959), (5933, 3539575), (8725, 2406911), (10891, 1928225), (22685, 925735), (29665, 707915), (54455, 385645), (77129, 272275), (113425, 185147), (141583, 148325)]