81111520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{72421}}^1$

素因数の和:72443

約数の個数: 48

約数和(自身を含む): 219004128

約数和(自身を除く): 137892608

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 72421, 144842, 289684, 362105, 506947, 579368, 724210, 1013894, 1158736, 1448420, 2027788, 2317472, 2534735, 2896840, 4055576, 5069470, 5793680, 8111152, 10138940, 11587360, 16222304, 20277880, 40555760, 81111520]

約数ペア:

[(1, 81111520), (2, 40555760), (4, 20277880), (5, 16222304), (7, 11587360), (8, 10138940), (10, 8111152), (14, 5793680), (16, 5069470), (20, 4055576), (28, 2896840), (32, 2534735), (35, 2317472), (40, 2027788), (56, 1448420), (70, 1158736), (80, 1013894), (112, 724210), (140, 579368), (160, 506947), (224, 362105), (280, 289684), (560, 144842), (1120, 72421)]