21995229

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 32489856

約数和(自身を除く): 10494627

約数列:

[1, 3, 17, 41, 51, 67, 123, 157, 201, 471, 697, 1139, 2091, 2669, 2747, 3417, 6437, 8007, 8241, 10519, 19311, 31557, 46699, 109429, 140097, 178823, 328287, 431279, 536469, 1293837, 7331743, 21995229]

約数ペア:

[(1, 21995229), (3, 7331743), (17, 1293837), (41, 536469), (51, 431279), (67, 328287), (123, 178823), (157, 140097), (201, 109429), (471, 46699), (697, 31557), (1139, 19311), (2091, 10519), (2669, 8241), (2747, 8007), (3417, 6437)]