81368540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{577}}^1\times {\mathrm{641}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 187022304

約数和(自身を除く): 105653764

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 577, 641, 1154, 1282, 2308, 2564, 2885, 3205, 5770, 6347, 6410, 7051, 11540, 12694, 12820, 14102, 25388, 28204, 31735, 35255, 63470, 70510, 126940, 141020, 369857, 739714, 1479428, 1849285, 3698570, 4068427, 7397140, 8136854, 16273708, 20342135, 40684270, 81368540]

約数ペア:

[(1, 81368540), (2, 40684270), (4, 20342135), (5, 16273708), (10, 8136854), (11, 7397140), (20, 4068427), (22, 3698570), (44, 1849285), (55, 1479428), (110, 739714), (220, 369857), (577, 141020), (641, 126940), (1154, 70510), (1282, 63470), (2308, 35255), (2564, 31735), (2885, 28204), (3205, 25388), (5770, 14102), (6347, 12820), (6410, 12694), (7051, 11540)]