21521349

素因数分解:

$3^3\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:322

約数の個数: 32

約数和(自身を含む): 33033600

約数和(自身を除く): 11512251

約数列:

[1, 3, 9, 27, 61, 73, 179, 183, 219, 537, 549, 657, 1611, 1647, 1971, 4453, 4833, 10919, 13067, 13359, 32757, 39201, 40077, 98271, 117603, 120231, 294813, 352809, 797087, 2391261, 7173783, 21521349]

約数ペア:

[(1, 21521349), (3, 7173783), (9, 2391261), (27, 797087), (61, 352809), (73, 294813), (179, 120231), (183, 117603), (219, 98271), (537, 40077), (549, 39201), (657, 32757), (1611, 13359), (1647, 13067), (1971, 10919), (4453, 4833)]