20809180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7823}}^1$

素因数の和:7858

約数の個数: 48

約数和(自身を含む): 52577280

約数和(自身を除く): 31768100

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7823, 15646, 31292, 39115, 54761, 78230, 109522, 148637, 156460, 219044, 273805, 297274, 547610, 594548, 743185, 1040459, 1095220, 1486370, 2080918, 2972740, 4161836, 5202295, 10404590, 20809180]

約数ペア:

[(1, 20809180), (2, 10404590), (4, 5202295), (5, 4161836), (7, 2972740), (10, 2080918), (14, 1486370), (19, 1095220), (20, 1040459), (28, 743185), (35, 594548), (38, 547610), (70, 297274), (76, 273805), (95, 219044), (133, 156460), (140, 148637), (190, 109522), (266, 78230), (380, 54761), (532, 39115), (665, 31292), (1330, 15646), (2660, 7823)]