21000913265

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{1013}}^1\times {\mathrm{1021}}^1$

素因数の和:2201

約数の個数: 32

約数和(自身を含む): 26264189952

約数和(自身を除く): 5263276687

約数列:

[1, 5, 31, 131, 155, 655, 1013, 1021, 4061, 5065, 5105, 20305, 31403, 31651, 132703, 133751, 157015, 158255, 663515, 668755, 1034273, 4113793, 4146281, 5171365, 20568965, 20731405, 32062463, 135489763, 160312315, 677448815, 4200182653, 21000913265]

約数ペア:

[(1, 21000913265), (5, 4200182653), (31, 677448815), (131, 160312315), (155, 135489763), (655, 32062463), (1013, 20731405), (1021, 20568965), (4061, 5171365), (5065, 4146281), (5105, 4113793), (20305, 1034273), (31403, 668755), (31651, 663515), (132703, 158255), (133751, 157015)]