21063915

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{4217}}^1$

素因数の和:4268

約数の個数: 32

約数和(自身を含む): 38468160

約数和(自身を除く): 17404245

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 111, 135, 185, 333, 555, 999, 1665, 4217, 4995, 12651, 21085, 37953, 63255, 113859, 156029, 189765, 468087, 569295, 780145, 1404261, 2340435, 4212783, 7021305, 21063915]

約数ペア:

[(1, 21063915), (3, 7021305), (5, 4212783), (9, 2340435), (15, 1404261), (27, 780145), (37, 569295), (45, 468087), (111, 189765), (135, 156029), (185, 113859), (333, 63255), (555, 37953), (999, 21085), (1665, 12651), (4217, 4995)]