21300813

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{499}}^1$

素因数の和:559

約数の個数: 40

約数和(自身を含む): 34848000

約数和(自身を除く): 13547187

約数列:

[1, 3, 9, 17, 27, 31, 51, 81, 93, 153, 279, 459, 499, 527, 837, 1377, 1497, 1581, 2511, 4491, 4743, 8483, 13473, 14229, 15469, 25449, 40419, 42687, 46407, 76347, 139221, 229041, 262973, 417663, 687123, 788919, 1252989, 2366757, 7100271, 21300813]

約数ペア:

[(1, 21300813), (3, 7100271), (9, 2366757), (17, 1252989), (27, 788919), (31, 687123), (51, 417663), (81, 262973), (93, 229041), (153, 139221), (279, 76347), (459, 46407), (499, 42687), (527, 40419), (837, 25449), (1377, 15469), (1497, 14229), (1581, 13473), (2511, 8483), (4491, 4743)]