20757975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2081}}^1$

素因数の和:2120

約数の個数: 48

約数和(自身を含む): 41306880

約数和(自身を除く): 20548905

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 133, 175, 285, 399, 475, 525, 665, 1425, 1995, 2081, 3325, 6243, 9975, 10405, 14567, 31215, 39539, 43701, 52025, 72835, 118617, 156075, 197695, 218505, 276773, 364175, 593085, 830319, 988475, 1092525, 1383865, 2965425, 4151595, 6919325, 20757975]

約数ペア:

[(1, 20757975), (3, 6919325), (5, 4151595), (7, 2965425), (15, 1383865), (19, 1092525), (21, 988475), (25, 830319), (35, 593085), (57, 364175), (75, 276773), (95, 218505), (105, 197695), (133, 156075), (175, 118617), (285, 72835), (399, 52025), (475, 43701), (525, 39539), (665, 31215), (1425, 14567), (1995, 10405), (2081, 9975), (3325, 6243)]