19998870

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1$

素因数の和:509

約数の個数: 64

約数和(自身を含む): 50561280

約数和(自身を除く): 30562410

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 43, 74, 86, 111, 129, 185, 215, 222, 258, 370, 419, 430, 555, 645, 838, 1110, 1257, 1290, 1591, 2095, 2514, 3182, 4190, 4773, 6285, 7955, 9546, 12570, 15503, 15910, 18017, 23865, 31006, 36034, 46509, 47730, 54051, 77515, 90085, 93018, 108102, 155030, 180170, 232545, 270255, 465090, 540510, 666629, 1333258, 1999887, 3333145, 3999774, 6666290, 9999435, 19998870]

約数ペア:

[(1, 19998870), (2, 9999435), (3, 6666290), (5, 3999774), (6, 3333145), (10, 1999887), (15, 1333258), (30, 666629), (37, 540510), (43, 465090), (74, 270255), (86, 232545), (111, 180170), (129, 155030), (185, 108102), (215, 93018), (222, 90085), (258, 77515), (370, 54051), (419, 47730), (430, 46509), (555, 36034), (645, 31006), (838, 23865), (1110, 18017), (1257, 15910), (1290, 15503), (1591, 12570), (2095, 9546), (2514, 7955), (3182, 6285), (4190, 4773)]