21497355

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{317}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 41075424

約数和(自身を除く): 19578069

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 137, 165, 317, 411, 495, 685, 951, 1233, 1507, 1585, 2055, 2853, 3487, 4521, 4755, 6165, 7535, 10461, 13563, 14265, 17435, 22605, 31383, 43429, 52305, 67815, 130287, 156915, 217145, 390861, 477719, 651435, 1433157, 1954305, 2388595, 4299471, 7165785, 21497355]

約数ペア:

[(1, 21497355), (3, 7165785), (5, 4299471), (9, 2388595), (11, 1954305), (15, 1433157), (33, 651435), (45, 477719), (55, 390861), (99, 217145), (137, 156915), (165, 130287), (317, 67815), (411, 52305), (495, 43429), (685, 31383), (951, 22605), (1233, 17435), (1507, 14265), (1585, 13563), (2055, 10461), (2853, 7535), (3487, 6165), (4521, 4755)]