19820240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:348

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 31176496

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 101, 110, 176, 202, 220, 223, 404, 440, 446, 505, 808, 880, 892, 1010, 1111, 1115, 1616, 1784, 2020, 2222, 2230, 2453, 3568, 4040, 4444, 4460, 4906, 5555, 8080, 8888, 8920, 9812, 11110, 12265, 17776, 17840, 19624, 22220, 22523, 24530, 39248, 44440, 45046, 49060, 88880, 90092, 98120, 112615, 180184, 196240, 225230, 247753, 360368, 450460, 495506, 900920, 991012, 1238765, 1801840, 1982024, 2477530, 3964048, 4955060, 9910120, 19820240]

約数ペア:

[(1, 19820240), (2, 9910120), (4, 4955060), (5, 3964048), (8, 2477530), (10, 1982024), (11, 1801840), (16, 1238765), (20, 991012), (22, 900920), (40, 495506), (44, 450460), (55, 360368), (80, 247753), (88, 225230), (101, 196240), (110, 180184), (176, 112615), (202, 98120), (220, 90092), (223, 88880), (404, 49060), (440, 45046), (446, 44440), (505, 39248), (808, 24530), (880, 22523), (892, 22220), (1010, 19624), (1111, 17840), (1115, 17776), (1616, 12265), (1784, 11110), (2020, 9812), (2222, 8920), (2230, 8888), (2453, 8080), (3568, 5555), (4040, 4906), (4444, 4460)]