21898431

素因数分解:

$3^7\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:88

約数の個数: 64

約数和(自身を含む): 37785600

約数和(自身を除く): 15887169

約数列:

[1, 3, 9, 17, 19, 27, 31, 51, 57, 81, 93, 153, 171, 243, 279, 323, 459, 513, 527, 589, 729, 837, 969, 1377, 1539, 1581, 1767, 2187, 2511, 2907, 4131, 4617, 4743, 5301, 7533, 8721, 10013, 12393, 13851, 14229, 15903, 22599, 26163, 30039, 37179, 41553, 42687, 47709, 67797, 78489, 90117, 128061, 143127, 235467, 270351, 384183, 429381, 706401, 811053, 1152549, 1288143, 2433159, 7299477, 21898431]

約数ペア:

[(1, 21898431), (3, 7299477), (9, 2433159), (17, 1288143), (19, 1152549), (27, 811053), (31, 706401), (51, 429381), (57, 384183), (81, 270351), (93, 235467), (153, 143127), (171, 128061), (243, 90117), (279, 78489), (323, 67797), (459, 47709), (513, 42687), (527, 41553), (589, 37179), (729, 30039), (837, 26163), (969, 22599), (1377, 15903), (1539, 14229), (1581, 13851), (1767, 12393), (2187, 10013), (2511, 8721), (2907, 7533), (4131, 5301), (4617, 4743)]