81324520

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{54949}}^1$

素因数の和:54997

約数の個数: 32

約数和(自身を含む): 187929000

約数和(自身を除く): 106604480

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 54949, 109898, 219796, 274745, 439592, 549490, 1098980, 2033113, 2197960, 4066226, 8132452, 10165565, 16264904, 20331130, 40662260, 81324520]

約数ペア:

[(1, 81324520), (2, 40662260), (4, 20331130), (5, 16264904), (8, 10165565), (10, 8132452), (20, 4066226), (37, 2197960), (40, 2033113), (74, 1098980), (148, 549490), (185, 439592), (296, 274745), (370, 219796), (740, 109898), (1480, 54949)]