2005163960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{8387}}^1$

素因数の和:8580

約数の個数: 64

約数和(自身を含む): 4650307200

約数和(自身を除く): 2645143240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 139, 172, 215, 278, 344, 430, 556, 695, 860, 1112, 1390, 1720, 2780, 5560, 5977, 8387, 11954, 16774, 23908, 29885, 33548, 41935, 47816, 59770, 67096, 83870, 119540, 167740, 239080, 335480, 360641, 721282, 1165793, 1442564, 1803205, 2331586, 2885128, 3606410, 4663172, 5828965, 7212820, 9326344, 11657930, 14425640, 23315860, 46631720, 50129099, 100258198, 200516396, 250645495, 401032792, 501290990, 1002581980, 2005163960]

約数ペア:

[(1, 2005163960), (2, 1002581980), (4, 501290990), (5, 401032792), (8, 250645495), (10, 200516396), (20, 100258198), (40, 50129099), (43, 46631720), (86, 23315860), (139, 14425640), (172, 11657930), (215, 9326344), (278, 7212820), (344, 5828965), (430, 4663172), (556, 3606410), (695, 2885128), (860, 2331586), (1112, 1803205), (1390, 1442564), (1720, 1165793), (2780, 721282), (5560, 360641), (5977, 335480), (8387, 239080), (11954, 167740), (16774, 119540), (23908, 83870), (29885, 67096), (33548, 59770), (41935, 47816)]