18904221

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{929}}^1$

素因数の和:978

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 15914979

約数列:

[1, 3, 7, 9, 17, 19, 21, 51, 57, 63, 119, 133, 153, 171, 323, 357, 399, 929, 969, 1071, 1197, 2261, 2787, 2907, 6503, 6783, 8361, 15793, 17651, 19509, 20349, 47379, 52953, 58527, 110551, 123557, 142137, 158859, 300067, 331653, 370671, 900201, 994959, 1112013, 2100469, 2700603, 6301407, 18904221]

約数ペア:

[(1, 18904221), (3, 6301407), (7, 2700603), (9, 2100469), (17, 1112013), (19, 994959), (21, 900201), (51, 370671), (57, 331653), (63, 300067), (119, 158859), (133, 142137), (153, 123557), (171, 110551), (323, 58527), (357, 52953), (399, 47379), (929, 20349), (969, 19509), (1071, 17651), (1197, 15793), (2261, 8361), (2787, 6783), (2907, 6503)]