81561580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:283

約数の個数: 72

約数和(自身を含む): 185054688

約数和(自身を除く): 103493108

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 103, 137, 170, 206, 274, 289, 340, 412, 515, 548, 578, 685, 1030, 1156, 1370, 1445, 1751, 2060, 2329, 2740, 2890, 3502, 4658, 5780, 7004, 8755, 9316, 11645, 14111, 17510, 23290, 28222, 29767, 35020, 39593, 46580, 56444, 59534, 70555, 79186, 119068, 141110, 148835, 158372, 197965, 239887, 282220, 297670, 395930, 479774, 595340, 791860, 959548, 1199435, 2398870, 4078079, 4797740, 8156158, 16312316, 20390395, 40780790, 81561580]

約数ペア:

[(1, 81561580), (2, 40780790), (4, 20390395), (5, 16312316), (10, 8156158), (17, 4797740), (20, 4078079), (34, 2398870), (68, 1199435), (85, 959548), (103, 791860), (137, 595340), (170, 479774), (206, 395930), (274, 297670), (289, 282220), (340, 239887), (412, 197965), (515, 158372), (548, 148835), (578, 141110), (685, 119068), (1030, 79186), (1156, 70555), (1370, 59534), (1445, 56444), (1751, 46580), (2060, 39593), (2329, 35020), (2740, 29767), (2890, 28222), (3502, 23290), (4658, 17510), (5780, 14111), (7004, 11645), (8755, 9316)]