20537275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 30855168

約数和(自身を除く): 10317893

約数列:

[1, 5, 11, 17, 23, 25, 55, 85, 115, 187, 191, 253, 275, 391, 425, 575, 935, 955, 1265, 1955, 2101, 3247, 4301, 4393, 4675, 4775, 6325, 9775, 10505, 16235, 21505, 21965, 35717, 48323, 52525, 74681, 81175, 107525, 109825, 178585, 241615, 373405, 821491, 892925, 1208075, 1867025, 4107455, 20537275]

約数ペア:

[(1, 20537275), (5, 4107455), (11, 1867025), (17, 1208075), (23, 892925), (25, 821491), (55, 373405), (85, 241615), (115, 178585), (187, 109825), (191, 107525), (253, 81175), (275, 74681), (391, 52525), (425, 48323), (575, 35717), (935, 21965), (955, 21505), (1265, 16235), (1955, 10505), (2101, 9775), (3247, 6325), (4301, 4775), (4393, 4675)]