20469897

素因数分解:

$3^2\times 7^3\times {\mathrm{19}}^1\times {\mathrm{349}}^1$

素因数の和:395

約数の個数: 48

約数和(自身を含む): 36400000

約数和(自身を除く): 15930103

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 343, 349, 399, 441, 931, 1029, 1047, 1197, 2443, 2793, 3087, 3141, 6517, 6631, 7329, 8379, 17101, 19551, 19893, 21987, 46417, 51303, 58653, 59679, 119707, 139251, 153909, 324919, 359121, 417753, 974757, 1077363, 2274433, 2924271, 6823299, 20469897]

約数ペア:

[(1, 20469897), (3, 6823299), (7, 2924271), (9, 2274433), (19, 1077363), (21, 974757), (49, 417753), (57, 359121), (63, 324919), (133, 153909), (147, 139251), (171, 119707), (343, 59679), (349, 58653), (399, 51303), (441, 46417), (931, 21987), (1029, 19893), (1047, 19551), (1197, 17101), (2443, 8379), (2793, 7329), (3087, 6631), (3141, 6517)]