20587645

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 7862147

約数列:

[1, 5, 13, 23, 47, 65, 115, 235, 293, 299, 611, 1081, 1465, 1495, 3055, 3809, 5405, 6739, 13771, 14053, 19045, 33695, 68855, 70265, 87607, 179023, 316733, 438035, 895115, 1583665, 4117529, 20587645]

約数ペア:

[(1, 20587645), (5, 4117529), (13, 1583665), (23, 895115), (47, 438035), (65, 316733), (115, 179023), (235, 87607), (293, 70265), (299, 68855), (611, 33695), (1081, 19045), (1465, 14053), (1495, 13771), (3055, 6739), (3809, 5405)]