21716905

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 33598080

約数和(自身を除く): 11881175

約数列:

[1, 5, 7, 17, 19, 35, 85, 95, 113, 119, 133, 289, 323, 565, 595, 665, 791, 1445, 1615, 1921, 2023, 2147, 2261, 3955, 5491, 9605, 10115, 10735, 11305, 13447, 15029, 27455, 32657, 36499, 38437, 67235, 75145, 163285, 182495, 192185, 228599, 255493, 620483, 1142995, 1277465, 3102415, 4343381, 21716905]

約数ペア:

[(1, 21716905), (5, 4343381), (7, 3102415), (17, 1277465), (19, 1142995), (35, 620483), (85, 255493), (95, 228599), (113, 192185), (119, 182495), (133, 163285), (289, 75145), (323, 67235), (565, 38437), (595, 36499), (665, 32657), (791, 27455), (1445, 15029), (1615, 13447), (1921, 11305), (2023, 10735), (2147, 10115), (2261, 9605), (3955, 5491)]