15439780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1060

約数の個数: 48

約数和(自身を含む): 34997760

約数和(自身を除く): 19557980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 991, 1558, 1982, 3116, 3895, 3964, 4955, 7790, 9910, 15580, 18829, 19820, 37658, 40631, 75316, 81262, 94145, 162524, 188290, 203155, 376580, 406310, 771989, 812620, 1543978, 3087956, 3859945, 7719890, 15439780]

約数ペア:

[(1, 15439780), (2, 7719890), (4, 3859945), (5, 3087956), (10, 1543978), (19, 812620), (20, 771989), (38, 406310), (41, 376580), (76, 203155), (82, 188290), (95, 162524), (164, 94145), (190, 81262), (205, 75316), (380, 40631), (410, 37658), (779, 19820), (820, 18829), (991, 15580), (1558, 9910), (1982, 7790), (3116, 4955), (3895, 3964)]