18709420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 40870368

約数和(自身を除く): 22160948

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 131, 148, 185, 193, 262, 370, 386, 524, 655, 740, 772, 965, 1310, 1930, 2620, 3860, 4847, 7141, 9694, 14282, 19388, 24235, 25283, 28564, 35705, 48470, 50566, 71410, 96940, 101132, 126415, 142820, 252830, 505660, 935471, 1870942, 3741884, 4677355, 9354710, 18709420]

約数ペア:

[(1, 18709420), (2, 9354710), (4, 4677355), (5, 3741884), (10, 1870942), (20, 935471), (37, 505660), (74, 252830), (131, 142820), (148, 126415), (185, 101132), (193, 96940), (262, 71410), (370, 50566), (386, 48470), (524, 35705), (655, 28564), (740, 25283), (772, 24235), (965, 19388), (1310, 14282), (1930, 9694), (2620, 7141), (3860, 4847)]