81782380

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1\times {\mathrm{271}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 175472640

約数和(自身を除く): 93690260

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 191, 271, 316, 382, 395, 542, 764, 790, 955, 1084, 1355, 1580, 1910, 2710, 3820, 5420, 15089, 21409, 30178, 42818, 51761, 60356, 75445, 85636, 103522, 107045, 150890, 207044, 214090, 258805, 301780, 428180, 517610, 1035220, 4089119, 8178238, 16356476, 20445595, 40891190, 81782380]

約数ペア:

[(1, 81782380), (2, 40891190), (4, 20445595), (5, 16356476), (10, 8178238), (20, 4089119), (79, 1035220), (158, 517610), (191, 428180), (271, 301780), (316, 258805), (382, 214090), (395, 207044), (542, 150890), (764, 107045), (790, 103522), (955, 85636), (1084, 75445), (1355, 60356), (1580, 51761), (1910, 42818), (2710, 30178), (3820, 21409), (5420, 15089)]