1268657620

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{809}}^1\times {\mathrm{881}}^1$

素因数の和:1788

約数の個数: 48

約数和(自身を含む): 2700507600

約数和(自身を除く): 1431849980

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 809, 881, 890, 1618, 1762, 1780, 3236, 3524, 4045, 4405, 8090, 8810, 16180, 17620, 72001, 78409, 144002, 156818, 288004, 313636, 360005, 392045, 712729, 720010, 784090, 1425458, 1440020, 1568180, 2850916, 3563645, 7127290, 14254580, 63432881, 126865762, 253731524, 317164405, 634328810, 1268657620]

約数ペア:

[(1, 1268657620), (2, 634328810), (4, 317164405), (5, 253731524), (10, 126865762), (20, 63432881), (89, 14254580), (178, 7127290), (356, 3563645), (445, 2850916), (809, 1568180), (881, 1440020), (890, 1425458), (1618, 784090), (1762, 720010), (1780, 712729), (3236, 392045), (3524, 360005), (4045, 313636), (4405, 288004), (8090, 156818), (8810, 144002), (16180, 78409), (17620, 72001)]