20267975

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 31664640

約数和(自身を除く): 11396665

約数列:

[1, 5, 7, 13, 25, 35, 59, 65, 91, 151, 175, 295, 325, 413, 455, 755, 767, 1057, 1475, 1963, 2065, 2275, 3775, 3835, 5285, 5369, 8909, 9815, 10325, 13741, 19175, 26425, 26845, 44545, 49075, 62363, 68705, 115817, 134225, 222725, 311815, 343525, 579085, 810719, 1559075, 2895425, 4053595, 20267975]

約数ペア:

[(1, 20267975), (5, 4053595), (7, 2895425), (13, 1559075), (25, 810719), (35, 579085), (59, 343525), (65, 311815), (91, 222725), (151, 134225), (175, 115817), (295, 68705), (325, 62363), (413, 49075), (455, 44545), (755, 26845), (767, 26425), (1057, 19175), (1475, 13741), (1963, 10325), (2065, 9815), (2275, 8909), (3775, 5369), (3835, 5285)]