21528477

素因数分解:

$3^3\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:163

約数の個数: 48

約数和(自身を含む): 35366400

約数和(自身を除く): 13837923

約数列:

[1, 3, 9, 17, 27, 31, 51, 89, 93, 153, 267, 279, 289, 459, 527, 801, 837, 867, 1513, 1581, 2403, 2601, 2759, 4539, 4743, 7803, 8277, 8959, 13617, 14229, 24831, 25721, 26877, 40851, 46903, 74493, 77163, 80631, 140709, 231489, 241893, 422127, 694467, 797351, 1266381, 2392053, 7176159, 21528477]

約数ペア:

[(1, 21528477), (3, 7176159), (9, 2392053), (17, 1266381), (27, 797351), (31, 694467), (51, 422127), (89, 241893), (93, 231489), (153, 140709), (267, 80631), (279, 77163), (289, 74493), (459, 46903), (527, 40851), (801, 26877), (837, 25721), (867, 24831), (1513, 14229), (1581, 13617), (2403, 8959), (2601, 8277), (2759, 7803), (4539, 4743)]