21200529

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 33454080

約数和(自身を除く): 12253551

約数列:

[1, 3, 7, 21, 59, 71, 177, 213, 241, 413, 497, 723, 1239, 1491, 1687, 4189, 5061, 12567, 14219, 17111, 29323, 42657, 51333, 87969, 99533, 119777, 298599, 359331, 1009549, 3028647, 7066843, 21200529]

約数ペア:

[(1, 21200529), (3, 7066843), (7, 3028647), (21, 1009549), (59, 359331), (71, 298599), (177, 119777), (213, 99533), (241, 87969), (413, 51333), (497, 42657), (723, 29323), (1239, 17111), (1491, 14219), (1687, 12567), (4189, 5061)]