20731347

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1489}}^1$

素因数の和:1532

約数の個数: 48

約数和(自身を含む): 39049920

約数和(自身を除く): 18318573

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1489, 1547, 1989, 4467, 4641, 10423, 13401, 13923, 19357, 25313, 31269, 58071, 75939, 93807, 135499, 174213, 177191, 227817, 329069, 406497, 531573, 987207, 1219491, 1594719, 2303483, 2961621, 6910449, 20731347]

約数ペア:

[(1, 20731347), (3, 6910449), (7, 2961621), (9, 2303483), (13, 1594719), (17, 1219491), (21, 987207), (39, 531573), (51, 406497), (63, 329069), (91, 227817), (117, 177191), (119, 174213), (153, 135499), (221, 93807), (273, 75939), (357, 58071), (663, 31269), (819, 25313), (1071, 19357), (1489, 13923), (1547, 13401), (1989, 10423), (4467, 4641)]