21243920

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{7177}}^1$

素因数の和:7227

約数の個数: 40

約数和(自身を含む): 50734104

約数和(自身を除く): 29490184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 7177, 14354, 28708, 35885, 57416, 71770, 114832, 143540, 265549, 287080, 531098, 574160, 1062196, 1327745, 2124392, 2655490, 4248784, 5310980, 10621960, 21243920]

約数ペア:

[(1, 21243920), (2, 10621960), (4, 5310980), (5, 4248784), (8, 2655490), (10, 2124392), (16, 1327745), (20, 1062196), (37, 574160), (40, 531098), (74, 287080), (80, 265549), (148, 143540), (185, 114832), (296, 71770), (370, 57416), (592, 35885), (740, 28708), (1480, 14354), (2960, 7177)]