81207940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{1459}}^1$

素因数の和:1513

約数の個数: 72

約数和(自身を含む): 195733440

約数和(自身を除く): 114525500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 121, 220, 230, 242, 253, 460, 484, 506, 605, 1012, 1210, 1265, 1459, 2420, 2530, 2783, 2918, 5060, 5566, 5836, 7295, 11132, 13915, 14590, 16049, 27830, 29180, 32098, 33557, 55660, 64196, 67114, 80245, 134228, 160490, 167785, 176539, 320980, 335570, 353078, 369127, 671140, 706156, 738254, 882695, 1476508, 1765390, 1845635, 3530780, 3691270, 4060397, 7382540, 8120794, 16241588, 20301985, 40603970, 81207940]

約数ペア:

[(1, 81207940), (2, 40603970), (4, 20301985), (5, 16241588), (10, 8120794), (11, 7382540), (20, 4060397), (22, 3691270), (23, 3530780), (44, 1845635), (46, 1765390), (55, 1476508), (92, 882695), (110, 738254), (115, 706156), (121, 671140), (220, 369127), (230, 353078), (242, 335570), (253, 320980), (460, 176539), (484, 167785), (506, 160490), (605, 134228), (1012, 80245), (1210, 67114), (1265, 64196), (1459, 55660), (2420, 33557), (2530, 32098), (2783, 29180), (2918, 27830), (5060, 16049), (5566, 14590), (5836, 13915), (7295, 11132)]