20621175

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{499}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 37200000

約数和(自身を除く): 16578825

約数列:

[1, 3, 5, 15, 19, 25, 29, 57, 75, 87, 95, 145, 285, 435, 475, 499, 551, 725, 1425, 1497, 1653, 2175, 2495, 2755, 7485, 8265, 9481, 12475, 13775, 14471, 28443, 37425, 41325, 43413, 47405, 72355, 142215, 217065, 237025, 274949, 361775, 711075, 824847, 1085325, 1374745, 4124235, 6873725, 20621175]

約数ペア:

[(1, 20621175), (3, 6873725), (5, 4124235), (15, 1374745), (19, 1085325), (25, 824847), (29, 711075), (57, 361775), (75, 274949), (87, 237025), (95, 217065), (145, 142215), (285, 72355), (435, 47405), (475, 43413), (499, 41325), (551, 37425), (725, 28443), (1425, 14471), (1497, 13775), (1653, 12475), (2175, 9481), (2495, 8265), (2755, 7485)]