20986925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:182

約数の個数: 48

約数和(自身を含む): 30533760

約数和(自身を除く): 9546835

約数列:

[1, 5, 17, 19, 23, 25, 85, 95, 113, 115, 323, 391, 425, 437, 475, 565, 575, 1615, 1921, 1955, 2147, 2185, 2599, 2825, 7429, 8075, 9605, 9775, 10735, 10925, 12995, 36499, 37145, 44183, 48025, 49381, 53675, 64975, 182495, 185725, 220915, 246905, 839477, 912475, 1104575, 1234525, 4197385, 20986925]

約数ペア:

[(1, 20986925), (5, 4197385), (17, 1234525), (19, 1104575), (23, 912475), (25, 839477), (85, 246905), (95, 220915), (113, 185725), (115, 182495), (323, 64975), (391, 53675), (425, 49381), (437, 48025), (475, 44183), (565, 37145), (575, 36499), (1615, 12995), (1921, 10925), (1955, 10735), (2147, 9775), (2185, 9605), (2599, 8075), (2825, 7429)]