81239420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1\times {\mathrm{353}}^1$

素因数の和:710

約数の個数: 48

約数和(自身を含む): 176275008

約数和(自身を除く): 95035588

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 311, 353, 370, 622, 706, 740, 1244, 1412, 1555, 1765, 3110, 3530, 6220, 7060, 11507, 13061, 23014, 26122, 46028, 52244, 57535, 65305, 109783, 115070, 130610, 219566, 230140, 261220, 439132, 548915, 1097830, 2195660, 4061971, 8123942, 16247884, 20309855, 40619710, 81239420]

約数ペア:

[(1, 81239420), (2, 40619710), (4, 20309855), (5, 16247884), (10, 8123942), (20, 4061971), (37, 2195660), (74, 1097830), (148, 548915), (185, 439132), (311, 261220), (353, 230140), (370, 219566), (622, 130610), (706, 115070), (740, 109783), (1244, 65305), (1412, 57535), (1555, 52244), (1765, 46028), (3110, 26122), (3530, 23014), (6220, 13061), (7060, 11507)]