18778880740

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1\times {\mathrm{29387}}^1$

素因数の和:29844

約数の個数: 48

約数和(自身を含む): 39991190400

約数和(自身を除く): 21212309660

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 359, 445, 718, 890, 1436, 1780, 1795, 3590, 7180, 29387, 31951, 58774, 63902, 117548, 127804, 146935, 159755, 293870, 319510, 587740, 639020, 2615443, 5230886, 10461772, 10549933, 13077215, 21099866, 26154430, 42199732, 52308860, 52749665, 105499330, 210998660, 938944037, 1877888074, 3755776148, 4694720185, 9389440370, 18778880740]

約数ペア:

[(1, 18778880740), (2, 9389440370), (4, 4694720185), (5, 3755776148), (10, 1877888074), (20, 938944037), (89, 210998660), (178, 105499330), (356, 52749665), (359, 52308860), (445, 42199732), (718, 26154430), (890, 21099866), (1436, 13077215), (1780, 10549933), (1795, 10461772), (3590, 5230886), (7180, 2615443), (29387, 639020), (31951, 587740), (58774, 319510), (63902, 293870), (117548, 159755), (127804, 146935)]