19988880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{2251}}^1$

素因数の和:2304

約数の個数: 80

約数和(自身を含む): 63668544

約数和(自身を除く): 43679664

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 37, 40, 48, 60, 74, 80, 111, 120, 148, 185, 222, 240, 296, 370, 444, 555, 592, 740, 888, 1110, 1480, 1776, 2220, 2251, 2960, 4440, 4502, 6753, 8880, 9004, 11255, 13506, 18008, 22510, 27012, 33765, 36016, 45020, 54024, 67530, 83287, 90040, 108048, 135060, 166574, 180080, 249861, 270120, 333148, 416435, 499722, 540240, 666296, 832870, 999444, 1249305, 1332592, 1665740, 1998888, 2498610, 3331480, 3997776, 4997220, 6662960, 9994440, 19988880]

約数ペア:

[(1, 19988880), (2, 9994440), (3, 6662960), (4, 4997220), (5, 3997776), (6, 3331480), (8, 2498610), (10, 1998888), (12, 1665740), (15, 1332592), (16, 1249305), (20, 999444), (24, 832870), (30, 666296), (37, 540240), (40, 499722), (48, 416435), (60, 333148), (74, 270120), (80, 249861), (111, 180080), (120, 166574), (148, 135060), (185, 108048), (222, 90040), (240, 83287), (296, 67530), (370, 54024), (444, 45020), (555, 36016), (592, 33765), (740, 27012), (888, 22510), (1110, 18008), (1480, 13506), (1776, 11255), (2220, 9004), (2251, 8880), (2960, 6753), (4440, 4502)]