21871941

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{709}}^1$

素因数の和:845

約数の個数: 32

約数和(自身を含む): 36261120

約数和(自身を除く): 14389179

約数列:

[1, 3, 7, 13, 21, 39, 91, 113, 273, 339, 709, 791, 1469, 2127, 2373, 4407, 4963, 9217, 10283, 14889, 27651, 30849, 64519, 80117, 193557, 240351, 560819, 1041521, 1682457, 3124563, 7290647, 21871941]

約数ペア:

[(1, 21871941), (3, 7290647), (7, 3124563), (13, 1682457), (21, 1041521), (39, 560819), (91, 240351), (113, 193557), (273, 80117), (339, 64519), (709, 30849), (791, 27651), (1469, 14889), (2127, 10283), (2373, 9217), (4407, 4963)]