21471561

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:563

約数の個数: 40

約数和(自身を含む): 35126784

約数和(自身を除く): 13655223

約数列:

[1, 3, 9, 17, 27, 31, 51, 81, 93, 153, 279, 459, 503, 527, 837, 1377, 1509, 1581, 2511, 4527, 4743, 8551, 13581, 14229, 15593, 25653, 40743, 42687, 46779, 76959, 140337, 230877, 265081, 421011, 692631, 795243, 1263033, 2385729, 7157187, 21471561]

約数ペア:

[(1, 21471561), (3, 7157187), (9, 2385729), (17, 1263033), (27, 795243), (31, 692631), (51, 421011), (81, 265081), (93, 230877), (153, 140337), (279, 76959), (459, 46779), (503, 42687), (527, 40743), (837, 25653), (1377, 15593), (1509, 14229), (1581, 13581), (2511, 8551), (4527, 4743)]