161213920

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{20563}}^1$

素因数の和:20592

約数の個数: 72

約数和(自身を含む): 443071944

約数和(自身を除く): 281858024

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 20563, 41126, 82252, 102815, 143941, 164504, 205630, 287882, 329008, 411260, 575764, 658016, 719705, 822520, 1007587, 1151528, 1439410, 1645040, 2015174, 2303056, 2878820, 3290080, 4030348, 4606112, 5037935, 5757640, 8060696, 10075870, 11515280, 16121392, 20151740, 23030560, 32242784, 40303480, 80606960, 161213920]

約数ペア:

[(1, 161213920), (2, 80606960), (4, 40303480), (5, 32242784), (7, 23030560), (8, 20151740), (10, 16121392), (14, 11515280), (16, 10075870), (20, 8060696), (28, 5757640), (32, 5037935), (35, 4606112), (40, 4030348), (49, 3290080), (56, 2878820), (70, 2303056), (80, 2015174), (98, 1645040), (112, 1439410), (140, 1151528), (160, 1007587), (196, 822520), (224, 719705), (245, 658016), (280, 575764), (392, 411260), (490, 329008), (560, 287882), (784, 205630), (980, 164504), (1120, 143941), (1568, 102815), (1960, 82252), (3920, 41126), (7840, 20563)]