21915159

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 37252608

約数和(自身を除く): 15337449

約数列:

[1, 3, 7, 17, 21, 23, 51, 69, 119, 157, 161, 289, 357, 391, 471, 483, 867, 1099, 1173, 2023, 2669, 2737, 3297, 3611, 6069, 6647, 8007, 8211, 10833, 18683, 19941, 25277, 45373, 46529, 56049, 61387, 75831, 136119, 139587, 184161, 317611, 429709, 952833, 1043579, 1289127, 3130737, 7305053, 21915159]

約数ペア:

[(1, 21915159), (3, 7305053), (7, 3130737), (17, 1289127), (21, 1043579), (23, 952833), (51, 429709), (69, 317611), (119, 184161), (157, 139587), (161, 136119), (289, 75831), (357, 61387), (391, 56049), (471, 46529), (483, 45373), (867, 25277), (1099, 19941), (1173, 18683), (2023, 10833), (2669, 8211), (2737, 8007), (3297, 6647), (3611, 6069)]