20195575

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 29060640

約数和(自身を除く): 8865065

約数列:

[1, 5, 17, 19, 25, 41, 61, 85, 95, 205, 305, 323, 425, 475, 697, 779, 1025, 1037, 1159, 1525, 1615, 2501, 3485, 3895, 5185, 5795, 8075, 12505, 13243, 17425, 19475, 19703, 25925, 28975, 42517, 47519, 62525, 66215, 98515, 212585, 237595, 331075, 492575, 807823, 1062925, 1187975, 4039115, 20195575]

約数ペア:

[(1, 20195575), (5, 4039115), (17, 1187975), (19, 1062925), (25, 807823), (41, 492575), (61, 331075), (85, 237595), (95, 212585), (205, 98515), (305, 66215), (323, 62525), (425, 47519), (475, 42517), (697, 28975), (779, 25925), (1025, 19703), (1037, 19475), (1159, 17425), (1525, 13243), (1615, 12505), (2501, 8075), (3485, 5795), (3895, 5185)]