21203728

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{14563}}^1$

素因数の和:14591

約数の個数: 40

約数和(自身を含む): 50566208

約数和(自身を除く): 29362480

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 14563, 29126, 58252, 101941, 116504, 189319, 203882, 233008, 378638, 407764, 757276, 815528, 1325233, 1514552, 1631056, 2650466, 3029104, 5300932, 10601864, 21203728]

約数ペア:

[(1, 21203728), (2, 10601864), (4, 5300932), (7, 3029104), (8, 2650466), (13, 1631056), (14, 1514552), (16, 1325233), (26, 815528), (28, 757276), (52, 407764), (56, 378638), (91, 233008), (104, 203882), (112, 189319), (182, 116504), (208, 101941), (364, 58252), (728, 29126), (1456, 14563)]