20865830

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1\times {\mathrm{353}}^1$

素因数の和:640

約数の個数: 32

約数和(自身を含む): 39455424

約数和(自身を除く): 18589594

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 257, 353, 514, 706, 1285, 1765, 2570, 3530, 5911, 8119, 11822, 16238, 29555, 40595, 59110, 81190, 90721, 181442, 453605, 907210, 2086583, 4173166, 10432915, 20865830]

約数ペア:

[(1, 20865830), (2, 10432915), (5, 4173166), (10, 2086583), (23, 907210), (46, 453605), (115, 181442), (230, 90721), (257, 81190), (353, 59110), (514, 40595), (706, 29555), (1285, 16238), (1765, 11822), (2570, 8119), (3530, 5911)]