20215920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:790

約数の個数: 80

約数和(自身を含む): 63245952

約数和(自身を除く): 43030032

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 131, 240, 262, 393, 524, 643, 655, 786, 1048, 1286, 1310, 1572, 1929, 1965, 2096, 2572, 2620, 3144, 3215, 3858, 3930, 5144, 5240, 6288, 6430, 7716, 7860, 9645, 10288, 10480, 12860, 15432, 15720, 19290, 25720, 30864, 31440, 38580, 51440, 77160, 84233, 154320, 168466, 252699, 336932, 421165, 505398, 673864, 842330, 1010796, 1263495, 1347728, 1684660, 2021592, 2526990, 3369320, 4043184, 5053980, 6738640, 10107960, 20215920]

約数ペア:

[(1, 20215920), (2, 10107960), (3, 6738640), (4, 5053980), (5, 4043184), (6, 3369320), (8, 2526990), (10, 2021592), (12, 1684660), (15, 1347728), (16, 1263495), (20, 1010796), (24, 842330), (30, 673864), (40, 505398), (48, 421165), (60, 336932), (80, 252699), (120, 168466), (131, 154320), (240, 84233), (262, 77160), (393, 51440), (524, 38580), (643, 31440), (655, 30864), (786, 25720), (1048, 19290), (1286, 15720), (1310, 15432), (1572, 12860), (1929, 10480), (1965, 10288), (2096, 9645), (2572, 7860), (2620, 7716), (3144, 6430), (3215, 6288), (3858, 5240), (3930, 5144)]