18983440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 32084720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 109, 112, 140, 218, 280, 311, 436, 545, 560, 622, 763, 872, 1090, 1244, 1526, 1555, 1744, 2177, 2180, 2488, 3052, 3110, 3815, 4354, 4360, 4976, 6104, 6220, 7630, 8708, 8720, 10885, 12208, 12440, 15260, 17416, 21770, 24880, 30520, 33899, 34832, 43540, 61040, 67798, 87080, 135596, 169495, 174160, 237293, 271192, 338990, 474586, 542384, 677980, 949172, 1186465, 1355960, 1898344, 2372930, 2711920, 3796688, 4745860, 9491720, 18983440]

約数ペア:

[(1, 18983440), (2, 9491720), (4, 4745860), (5, 3796688), (7, 2711920), (8, 2372930), (10, 1898344), (14, 1355960), (16, 1186465), (20, 949172), (28, 677980), (35, 542384), (40, 474586), (56, 338990), (70, 271192), (80, 237293), (109, 174160), (112, 169495), (140, 135596), (218, 87080), (280, 67798), (311, 61040), (436, 43540), (545, 34832), (560, 33899), (622, 30520), (763, 24880), (872, 21770), (1090, 17416), (1244, 15260), (1526, 12440), (1555, 12208), (1744, 10885), (2177, 8720), (2180, 8708), (2488, 7630), (3052, 6220), (3110, 6104), (3815, 4976), (4354, 4360)]