20661417

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 36865920

約数和(自身を除く): 16204503

約数列:

[1, 3, 7, 9, 19, 21, 41, 57, 63, 123, 133, 171, 287, 369, 399, 421, 779, 861, 1197, 1263, 2337, 2583, 2947, 3789, 5453, 7011, 7999, 8841, 16359, 17261, 23997, 26523, 49077, 51783, 55993, 71991, 120827, 155349, 167979, 327959, 362481, 503937, 983877, 1087443, 2295713, 2951631, 6887139, 20661417]

約数ペア:

[(1, 20661417), (3, 6887139), (7, 2951631), (9, 2295713), (19, 1087443), (21, 983877), (41, 503937), (57, 362481), (63, 327959), (123, 167979), (133, 155349), (171, 120827), (287, 71991), (369, 55993), (399, 51783), (421, 49077), (779, 26523), (861, 23997), (1197, 17261), (1263, 16359), (2337, 8841), (2583, 7999), (2947, 7011), (3789, 5453)]