21387088

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1289}}^1$

素因数の和:1375

約数の個数: 40

約数和(自身を含む): 44628840

約数和(自身を除く): 23241752

約数列:

[1, 2, 4, 8, 16, 17, 34, 61, 68, 122, 136, 244, 272, 488, 976, 1037, 1289, 2074, 2578, 4148, 5156, 8296, 10312, 16592, 20624, 21913, 43826, 78629, 87652, 157258, 175304, 314516, 350608, 629032, 1258064, 1336693, 2673386, 5346772, 10693544, 21387088]

約数ペア:

[(1, 21387088), (2, 10693544), (4, 5346772), (8, 2673386), (16, 1336693), (17, 1258064), (34, 629032), (61, 350608), (68, 314516), (122, 175304), (136, 157258), (244, 87652), (272, 78629), (488, 43826), (976, 21913), (1037, 20624), (1289, 16592), (2074, 10312), (2578, 8296), (4148, 5156)]