21000375

素因数分解:

$3^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{1697}}^1$

素因数の和:1729

約数の個数: 48

約数和(自身を含む): 41322528

約数和(自身を除く): 20322153

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 99, 125, 165, 225, 275, 375, 495, 825, 1125, 1375, 1697, 2475, 4125, 5091, 8485, 12375, 15273, 18667, 25455, 42425, 56001, 76365, 93335, 127275, 168003, 212125, 280005, 381825, 466675, 636375, 840015, 1400025, 1909125, 2333375, 4200075, 7000125, 21000375]

約数ペア:

[(1, 21000375), (3, 7000125), (5, 4200075), (9, 2333375), (11, 1909125), (15, 1400025), (25, 840015), (33, 636375), (45, 466675), (55, 381825), (75, 280005), (99, 212125), (125, 168003), (165, 127275), (225, 93335), (275, 76365), (375, 56001), (495, 42425), (825, 25455), (1125, 18667), (1375, 15273), (1697, 12375), (2475, 8485), (4125, 5091)]